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Word Lengths Starting With O

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oafishnessThe state or condition of being oafish; stupidity; dullness; folly.oakinessThe property of being oakyoakleavesplural of oakleafoakmossEvernia prunastri, a lichen found primarily on oak trees and used in perfume.oaknessThe quality of being oak, or of being an oak tree.oaktreesplural of oaktreeoakwoodsplural of oakwoodoarfishesplural of oarfishoaritisArchaic form of ovaritis.oarlessnessAbsence of oars.oasesplural of oasisoasisA spring of fresh water, surrounded by a fertile region of vegetation, in a desert.oasislessLacking an oasis.oasthousesplural of oasthouseoastsplural of oastoatcakesplural of oatcakeoatersplural of oater.oatgrassAny of various grasses resembling oats:oathlessWithout an oath or oaths.oathsplural of oathobdiplostemonous(botany, of flowers) Having two sets of stamens in alternating whorls, with the outer whorl opposite the petals.obduratenessThe characteristic of being obdurate; stubbornness.obduredness(obsolete, physical or figurative) hardnessobeahsplural of obeahobediencesplural of obedienceobedientialnessThe quality of being obediential.obedientiariesplural of obedientiaryobedientnessQuality of being obedient.obeisancesplural of obeisanceobeliasplural of obeliaobelisksplural of obeliskobelizesthird-person singular simple present indicative of obelizeobelusA dagger symbol (†), which is used in printed matter as a reference mark to refer the reader to a footnote, marginal note, etc.; beside a person's name to indicate that the person is deceased; or beside a date to indicate that it is a person's death date; an obelisk.obelusesplural of obelusobentosplural of obentoobesogenesisThe creation of obesityobeysthird-person singular simple present indicative of obeyobfuscatesthird-person singular simple present indicative of obfuscateobfuscationsplural of obfuscationobfuscousdark; obscure; shadowyobhaplostemonous(botany) Having a single series of stamens equal in number to petals, but opposite with them.obitsplural of obitobituariesplural of obituaryobjectificationsplural of objectificationobjectifiesthird-person singular simple present indicative of objectifyobjectionablenessThe quality of being objectionable.objectionsplural of objectionobjectivenessThe characteristic of being objective; neutrality.objectivesplural of objectiveobjectivizesthird-person singular simple present indicative of objectivizeobjectlessWithout a purpose.objectlessnessThe state or condition of being objectless.objectnessThe state of being an objectobjectorsplural of objectorobjectress(rare) A female objector.objectsplural of objectobjurgationsplural of objurgationoblastsplural of oblastoblateness(uncountable) The state of being oblateoblatesplural of oblateoblationsplural of oblationobligantsplural of obligantobligatesthird-person singular simple present indicative of obligateobligationsplural of obligationobligativenessThe quality of being obligative.obligatorinessThe quality or state of being obligatory.obligatorsplural of obligatorobligatosplural of obligatoobligednessQuality of being obliged.obligersplural of obligerobligesthird-person singular simple present indicative of obligeobligingnessThe quality of being obliging; the tendency to cater for the desires of others.obligorsplural of obligorobliquenessSynonym of obliquity.obliquesCollectively, the abdominal muscles responsible for rotation of the trunk.obliquitiesplural of obliquityobliquitousCharacterized by obliquity.obliquus(anatomy) An obliquus muscle; a muscle running obliquely.obliteransProducing obstruction due to inflammation and fibrosis.obliteratesthird-person singular simple present indicative of obliterateobliterationsplural of obliterationobliteratorsplural of obliteratoroblivious(usually with to or of) Lacking awareness; unmindful; unaware, unconscious of.obliviousnessThe characteristic of being oblivious.oblongnessThe quality of being oblong in shape.oblongsplural of oblongobloquious(obsolete) Containing obloquy; reproachful.obnoctiousObsolete spelling of obnoxious.obnosis(Scientology) Observing the obvious.obnoxiousExtremely offensive or unpleasant; very annoying, contemptible, or odious.obnoxiousnessThe characteristic of being obnoxious.obnubilous(obsolete, rare) Overclouded, cloudy.oboesplural of oboeobolosAlternative form of obolus.obolsplural of obolobolusA silver coin minted in Ancient Greece, valued at a sixth of a drachma.obreptitiousDone or obtained by surprise, with secrecy, or by concealment of the truth.obs(linguistics) Abbreviation of obsolete.obscenenessQuality of being obscene.obscenitiesplural of obscenityobscurantistsplural of obscurantistobscurantsplural of obscurantobscurationsplural of obscurationobscurenessThe state or quality of being obscure.obscuresthird-person singular simple present indicative of obscureobscuritiesplural of obscurityobsecrationsplural of obsecrationobsequies(plural only) Funeral rites.obsequiousExcessively eager and attentive to please or to obey instructions; fawning, subservient, servile.obsequiousnessThe quality of being obsequious; servile compliance.observablenessobservabilityobservablesplural of observableobservancesplural of observanceobservantnessQuality of being observant.observationsplural of observationobservatoriesplural of observatoryobservatorsplural of observatorobserveress(rare) A female observer.observerlessWithout observers.observersplural of observerobservesthird-person singular simple present indicative of observeobsess(passive voice, constructed with "with") To be preoccupied with a single topic or emotion.obsessednessThe quality of being obsessed; obsession.obsessesthird-person singular simple present indicative of obsessobsessionsplural of obsessionobsessivenessThe characteristic of being obsessive.obsidiansplural of obsidianobsidious(rare) besieging; besetting, obsessionalobsolescencesplural of obsolescenceobsoletenessThe quality or state of being obsolete or no longer in use.obstaclesplural of obstacleobstetriciansplural of obstetricianobstetricious(obsolete) Serving to assist childbirth; obstetric.obstetricksObsolete form of obstetrics.obstetrics(medicine) The care of women during and after pregnancy.obstinacious(US, regional, dated) obstinateobstinatenessThe characteristic of being obstinate.obstrepalous(nonstandard or dialect) obstreperousobstreperousAttended by, or making, a loud and tumultuous noise; boisterous.obstreperousnessThe quality of being obstreperous.obstropalousAlternative form of obstropulous.obstropolousAlternative form of obstropulous.obstropulous(UK, obsolete, slang) Synonym of obstreperous.obstropulousness(UK, obsolete, slang) The quality of being obstropulous.obstructednessThe quality of being obstructed.obstructionistsplural of obstructionistobstructionsplural of obstructionobstructivenessThe characteristic of being obstructive.obstructsthird-person singular simple present indicative of obstructobstruentsplural of obstruentobtainsthird-person singular simple present indicative of obtainobtrudesthird-person singular simple present indicative of obtrudeobtrusionsplural of obtrusionobtrusivenessThe characteristic of being obtrusive.obtundedness(medicine) The quality or state of being obtunded; non-alertness.obturatesthird-person singular simple present indicative of obturateobturationsplural of obturationobturatorius(anatomy) The obturator nerveobtusenessThe quality of being obtuse.obuncous(archaic, very rare) Crooked; bent.obversionsplural of obversionobviatesthird-person singular simple present indicative of obviateobviousEasily discovered, seen, or understood; self-explanatory.obviousnessThe characteristic of being obvious.obvs(slang, text messaging, Internet slang) Clipping of obviously.ocarinasplural of ocarinaoccasionalnessThe quality of being occasional.occasionlessWithout occasion.occasionsplural of occasionoccidentalisesthird-person singular simple present indicative of occidentaliseoccidentalizesthird-person singular simple present indicative of occidentalizeoccidentalsplural of occidentalocciduousWestern; occidental.occipitalis(anatomy) A muscle of the head that arises from the lateral two-thirds of the superior nuchal lines and from the mastoid part of the temporal bone, inserts into the galea aponeurotica, and acts to move the scalp; it is sometimes considered to be part of the occipitofrontalis muscle.occipitofrontalis(anatomy) A large flat muscle on each side of the vertex of the skull, consisting of an occipital portion (arising from the occipital and temporal bones) and a frontal portion that are separated by the epicranial aponeurosis, and serving to draw the scalp backwards, raising the eyebrows and wrinkling the forehead.occludesthird-person singular simple present indicative of occludeocclusionsplural of occlusionocclusivenessThe condition of being occlusive.occlusivesplural of occlusiveoccultistsplural of occultistoccultnessThe state or condition of being occult.occupanciesplural of occupancyoccupantlessWithout any occupant.occupantsplural of occupantoccupationlessHaving no occupation; jobless; idle.occupationsplural of occupationoccupiersplural of occupieroccupiesthird-person singular simple present indicative of occupyoccurancesMisspelling of occurrences.occurrencesplural of occurrenceoccursthird-person singular simple present indicative of occuroceanariumsplural of oceanariumoceanautsplural of oceanautoceanitesplural of oceaniteoceanlessWithout an ocean.oceanlinersplural of oceanlineroceanodromous(of a migratory fish) that migrate within the seas onlyoceanographersplural of oceanographeroceanologistsplural of oceanologistoceansplural of oceanoceanwardsAlternative form of oceanward.ocelliferousHaving spots like small eyes.ocelligerousocelliferousocellusA simple eye consisting of a single lens and a small number of sensory cells.ocelotsplural of ocelotocheraceousAlternative form of ochraceous.ocherous(US) Alternative form of ochrous.ochersplural of ocherochlesis(medicine) Crowd-poisoning; a disease occasioned or aggravated by overcrowding, especially due to lack of ventilation.ochlospecies(taxonomy) A taxonomic species concept characterized by large amounts of variation that is not correlated with geography or ecology; usually geographically widespread and having variants that may be consistently distinguishable locally but not globally.ochnaceous(botany) Belonging to the family Ochnaceae.ochraceousOchre-colored.ochratoxicosistoxicosis by an ochratoxinochreousAlternative form of ochrous.ochresplural of ochreochroleucousYellowish-white; having a faint tint of dingy yellowochronosis(medicine, pharmacology) Abnormal brown pigmentation of tissue (especially cartilage and ligaments), specifically that resulting from the accumulation of a melanin-like pigment derived from homogentisic acid in the metabolic disorder alkaptonuria.ochrousContaining ochre.ocotillosplural of ocotilloocreaceous(botany) Relating to, or having the form of an ocreaoctaeterisSynonym of octennium: An 8-year period, particularly (historical) in Greek calendrical and astronomical calculations.octagonsplural of octagonoctahedronsplural of octahedronoctahedrous(archaic) octahedraloctamerous(biology, zoology) Having parts in groups of eightoctametersplural of octameteroctandriousAlternative form of octandrous.octandrous(botany) Having eight stamens.octanesplural of octaneoctanolsplural of octanoloctanolysisalcoholysis using octanoloctansplural of octanoctantsplural of octantoctaples(obsolete) Synonym of octapla.octapusMisspelling of octopus.octarius(historical) The pint (eighth of a gallon) in the apothecaries' system.octastichous(botany) Having a phyllotaxis of eight leaves in each spiral around a stemoctavesplural of octaveoctavius(historical) Alternative form of octarius (the pint (eighth of a gallon) in the apothecaries' system)octetsplural of octetoctillionsplural of octillionoctobass(music) A very large bass requiring two musicians, one to finger and one to bow.octocentenariesplural of octocentenaryoctocontrabass(music) An instrument that is pitched one octave below the contrabass.octodactylous(zoology) Having eight fingers.octogenariansplural of octogenarianoctogynous(botany) Having eight pistils.octonarius(prosody) A verse having eight metrical feet.octonionics(physics) The application of the mathematics of octonions in various branches of physicsoctopetalous(botany) Having eight petals.octoploidsplural of octoploidoctopodes(rare) plural of octopusoctopodous(rare) Having eight feet.octopodsplural of octopodoctopus(countable, strictly) A mollusc from genus Octopus.octopusesplural of octopusoctoroonsplural of octoroonoctospermousHaving eight seeds.octosporousHaving eight sporesoctostichous(botany) octastichousoctosyllabicsplural of octosyllabicoctroisplural of octroioculesicsThe study of eye contact as a form of body language.oculiferousBearing an eye or eyes.oculigerousBearing an eye or eyes.oculistsplural of oculistoculocutaneousThat affects the eyes and the skinoculogenesisThe growth and development of the eye (in the foetus)oculolinctusA paraphilia involving licking the eyeballs.oculometricsSynonym of oculometry.oculoplasticssurgery dealing with the eye and related structuresoculorhinitis(pathology) inflammation of the mucous membranes of the eyelid and of the noseoculosyphilis(medicine, rare) Ocular syphilis: the ocular component or manifestations of syphilis; syphilis's effects on the eyes. In modern nosology not entirely distinct from the rest of neurosyphilis; sometimes formerly differentiated as, or in parallel with, parasyphilis.oculus(architecture) A window or other opening that has an oval or circular shape (as of an eye).odalisquesplural of odalisqueoddballsplural of oddballodditiesplural of oddityoddlingsplural of oddlingoddmentsplural of oddmentoddness(uncountable) The state or quality of being odd.oddnessesplural of oddnessoddsThe ratio of the probability of an event happening to that of it not happening.oddsmakersplural of oddsmakerodiferous(sometimes proscribed) Odoriferous; smellyodiferousnessThe quality of being odiferous.odiousArousing or meriting strong dislike, aversion, or intense displeasure.odiousness(uncountable) The condition of being odiousodistsplural of odistodometersplural of odometerodonotogenesisMisspelling of odontogenesis.odontiasisCutting of the teeth; dentition.odontoblastsplural of odontoblastodontobothritis(obsolete, pathology) alveolitis of the jawodontocetesplural of odontoceteodontogenesisThe formation and development of teethodontognathousHaving toothlike ridges on the jawodontolithus(obsolete) dental tartar; odontolithodontologistsplural of odontologistodontomatousRelating to an odontoma.odontometricsThe measurement of teethodontonecrosisNecrosis of the tooth.odontopaediatrics(dentistry) dentistry performed on infantsodontopediatricsAlternative form of odontopaediatrics.odontophorous(zoology, archaic) odontophoral.odontotremataceous(mycology, relational) Of or relating to the Odontotremataceae.odorantsplural of odorantodoriferousHaving an odor or fragrance.odoriferousnessThe quality of being odoriferous.odorizesthird-person singular simple present indicative of odorizeodorlessHaving no odor.odorlessnessAbsence of odor.odorousHaving a distinctive odor.odorousnessThe quality of being odorous.odorsplural of odorodortaxis(nematology) The movement of an organism with respect to, usually towards, a volatile airborne chemical.odouriferousObsolete form of odoriferous.odourlessHaving no odour.odourlessnessAlternative spelling of odorlessness.odourousMisspelling of odorous.odourousnessMisspelling of odorousness.odoursplural of odourodsbodikinsAlternative form of ods bodikins.odumsplural of odumodysseysplural of odysseyoeconomus(ecclesiastical) A married priest (chiefly Orthodox Christian and Uniate usage), as opposed to a hieromonk.oecus(history) An apartment, room, or hall in an ancient Roman dwelling house.oedematous(British spelling) Alternative form of edematous.oeilladesplural of oeilladeoenocyteless(biology) That lacks an oenocyteoenologistsplural of oenologistoenophilesplural of oenophileoenotheraceous(botany, relational) Of or relating to the Oenotheraceae.oerstedsplural of oerstedoesophagismusoesophageal spasmoesophagitis(British spelling) Alternative form of esophagitis.oesophagoscopesplural of oesophagoscopeoesophagostenosisconstriction of the oesophagusoesophagostomiasis(pathology) A disease caused by infection by parasitic nematodes of the genus Oesophagostomumoesophagus(anatomy) The tube that carries food from the pharynx to the stomach.oesophagusesplural of oesophagusoesteoclastogenesisMisspelling of osteoclastogenesis.oestrogensplural of oestrogenoestrous(British) Alternative spelling of estrous.oestrus(countable) A biting fly of the genus Oestrus; a botfly.oeuvresplural of oeuvreofaysplural of ofayoffalsplural of offaloffbeatnessThe quality of being offbeat.offcutsplural of offcutoffencelessAlternative form of offenseless.offencelessnessAbsence of offence.offencesplural of offenceoffendednessThe state or quality of being offended.offendersplural of offenderoffendressA woman who offends; a female offenderoffendsthird-person singular simple present indicative of offendoffenselessUnoffending; innocent; inoffensive; harmless.offenselessnessAbsence of offense.offensesplural of offenseoffensivenessThe quality of being offensive.offensivesplural of offensiveofferersplural of offererofferingsplural of offeringofferlessWithout offerofferorsplural of offeroroffersplural of offeroffertoriesplural of offertoryoffgasAlternative form of off-gas.offglidesplural of offglideoffhandednessThe property of being offhand.officeholdersplural of officeholderofficelessWithout an office (room or building where business is carried out).officeress(archaic or humorous, rare) A female officer.officerlessWithout an officer.officersplural of officerofficesplural of officeofficialdomsplural of officialdomofficializesthird-person singular simple present indicative of officializeofficialnessThe quality of being official.officialsplural of officialofficiantsplural of officiantofficiatesthird-person singular simple present indicative of officiateofficiationsplural of officiationofficiousOffensively intrusive or interfering in offering advice and services.officiousnessThe quality of being officious.offishnessQuality of being offish.offlinenessThe state or quality of being offline.offloadsplural of offloadoffnessThe quality of being off (in various senses).offprintsplural of offprintoffresplural of offreoffroadersplural of offroaderoffsthird-person singular simple present indicative of offoffseasonsplural of offseasonoffsetsplural of offsetoffshootsplural of offshootoffsidesplural of offsideoffspringlessWithout offspring.offsprings(computing, otherwise nonstandard and proscribed) plural of offspringoftenness(rare) The quality of happening often; frequency.oftens(UK, regional, archaic) Synonym of often.oftentimes(chiefly US, elsewhere archaic) Frequently; often.oftenwhiles(archaic) often; frequentlyoftimes(chiefly US, uncommon) (elsewhere, archaic) Alternative form of ofttimes.oftness(archaic, rare) The quality of happening often; frequency.ofttimes(chiefly US, uncommon) (elsewhere, archaic) Often, frequently.oftwhiles(archaic) Often; oftentimes.ogamsplural of ogamogdoadsplural of ogdoadogdoasAlternative form of ogdoad (“a thing made up of eight parts”).ogeesplural of ogeeoghamsplural of oghamoglersplural of ogleroglesplural of ogle.ogresplural of ogreohnologousRelating to ohnologues.oidiomycosisinfection with Oidium species; blastomycosisoikeiosis(philosophy, ethics) The perception of something as being one's own, or belonging to oneself.oikos(Christianity) Synonym of kontakion (hymn or poem recited as a dialogue)oilbirdsplural of oilbirdoilcakesplural of oilcakeoilcansplural of oilcanoilersplural of oileroilfieldsplural of oilfieldoiliesplural of oilyoilinessThe quality of being oily.oillessLacking, or not using, oil.oillessness(rare) Absence of oil.oilpalmsplural of oilpalmoilrigsplural of oilrigoilsandsplural of oilsandoilseedsplural of oilseedoilskinsA waterproof garment, made from oilskin, used especially at sea.oilstonesplural of oilstoneoiltightnessThe quality of being oiltight.oilwellsplural of oilwelloilworksA factory producing oil (whether petroleum, oil shale, or vegetable oils).oinksplural of oinkointmentsplural of ointmentoioxenous(biology, of a parasite) Having a single species of hostokapisplural of okapiokavirusAny virus of the genus Okavirus that infects crustaceansokayness(informal) The state or condition of being okay; adequateness, tolerableness.okaysplural of okayokrasplural of okraolacaceous(botany, relational) Of or relating to the Olacaceae.oldass(US, vulgar) Used in the same context as old, but more intense.oldfanglednessThe quality of being oldfangled.oldiesplural of oldieoldishnessThe quality of being oldish.oldnessThe state of being old; age.olds(UK, slang) One's parents.oldsightednessold sight; presbyopiaoldstersplural of oldsteroldstylesplural of oldstyleoldtimersplural of oldtimeroleaceousOf or relating to the plant family Oleaceae.oleaginousnessThe state or condition of being oleaginous; oiliness, unctuousness.oleandersplural of oleanderoleasArchaic form of oleate.oleatesplural of oleateolecranonsplural of olecranonolefinsplural of olefinoleiferousThat produces oiloleogenesisThe biosynthesis of triglycerides in plantsoleogustus(biochemistry, neologism) A proposed basic taste sensation triggered by fatty acids.oleolysisThe separation of a layer of oil from a mixtureoleoresinousOf or relating to oleoresin.oleoresinsplural of oleoresinoleousAlternative form of oleose.oleraceous(archaic) Relating to potherbs.olfacticsThe study of smells and how they are perceived.olfactoriesplural of olfactoryolfactronicsThe design and use of machines to analyze smells.oligandrous(botany) Having few stamens.oliganthous(botany) Having few flowers.oligarchiesplural of oligarchyoligarchsplural of oligarcholigoamnios(medicine) The presence of an abnormally small volume of amniotic fluid.oligoarthritis(medicine) A form of arthritis that only affects a few jointsoligochaetesplural of oligochaeteoligochaetousRelating to oligochaetes.oligodendrocytesplural of oligodendrocyteoligodendrogenesisThe formation of oligodendrocytes.oligodendrogliogenesisThe generation and development of oligodendrogliaoligodendrogliomagenesisThe formation and development of oligodendrogliomasoligodendrogliomasplural of oligodendrogliomaoligodendrogliosis(pathology) Any disease that affects the oligodendroglionoligogenesis(biochemistry) The creation of biochemical oligomersoligogynousExhibiting or relating to oligogyny.oligohidrosisSynonym of hypohidrosis.oligohydramnios(pathology) A deficit of amniotic fluid in the amniotic sac, causing distinctive deformations of the foetusoligomerous(biology) Having only a few members in a particular organoligomersplural of oligomeroligometastasis(medicine, pathology) A state of limited metastasis, especially of cancer, with several (but not many) metastatic sites.oligonucleotidesplural of oligonucleotideoligopeptidesplural of oligopeptideoligopetalous(botany) Having few petals.oligophagous(chiefly of insects) that feed on a restricted range of foodoligopoliesplural of oligopolyoligoribonucleotidesplural of oligoribonucleotideoligosaccharidesplural of oligosaccharideoligosaccharidosis(pathology) Any of several diseases characterised by increased levels of oligosaccharides in the urineoligospermous(botany) Having or bearing few seeds.oligosporogenousThat produces several sporesoligosynthesis(linguistics) The synthetic combining of a relatively small number of morphemes to form compound words.oligotrichous(biology) Relating to, or characteristic of, an oligotricholigoxenous(biology, of a parasite) Having several hosts during its life cycleolingosplural of olingooliniaceous(botany, relational) Of or relating to the Oliniaceae.oliosplural of olioolivaceousHaving the color of a green olive.olivelessWithout olives.olivenessThe state or condition of being olive in colour.olivenitesplural of oliveniteoliversplural of oliverolivesplural of oliveolivetsplural of olivetolivinesplural of olivineolivomycinsplural of olivomycinollamhsplural of ollamhollapodridasplural of ollapodridaollasplural of ollaolliesplural of ollieologiesplural of ologyologistsplural of ologistolorososplural of olorosoolpidiaceous(mycology, relational) Of or relating to the Olpidiaceae.olympiadsplural of olympiadomalous(mathematics) Satisfying an analog of the anomaly cancellation condition.omasitisinflammation of the omasumombibulousSynonym of omnibibulous.ombliferousA nonsense word of vague negative connotation.ombrogenous(of peat or a bog) Dependant on rain.ombrophilous(biology) Capable of thriving in areas of heavy rainfallombrophobousSynonym of ombrophobic.ombrophylousMisspelling of ombrophilous.ombudsombudsman (as an abbreviated or gender-neutral title, or in apposition, as in "ombuds office").ombudspersonsplural of ombudspersonomegasplural of omegaomeletsplural of omeletomelettesplural of omeletteomenlessWithout an omen.omensplural of omenomentitisinflammation of the omentumomersplural of omeromics(biology) Any of several biological subfields that aim to identify or characterize the totality of a certain type of biological entity, e.g. genomics (for genes) or proteomics (for proteins).ominousOf or pertaining to an omen or to omens; being or exhibiting an omen; significant.ominousnessThe quality of being ominous.omissionsplural of omissionomissivenessThe quality of being omissive.omitsthird-person singular simple present indicative of omitommatophoresplural of ommatophoreomnibibulous(rare) Able, or likely able, to drink almost anything (alcoholic).omnibusAn anthology of previously released material linked together by theme or author, especially in book form.omnibusesplural of omnibusomnicredulous(rare) Believing in everything.omnifariousOf many or all forms, varieties, or kinds.omnifariousnessQuality of being omnifarious.omniferous(archaic) That bears everything; producing all types.omnigenousConsisting of all kinds.omnimodousRelating to all modes, ways or sortsomniparousProducing or giving birth to all things; omniparient.omniphibiousOf an aircraft: able to land on water and on all kinds of terrain.omnipotencesplural of omnipotenceomnipotentsplural of omnipotentomnirangesplural of omnirangeomnisplural of omniomniscious(obsolete) Omniscient; all-knowing.omnishambles(UK, informal, chiefly politics) A situation that is bad or mismanaged in every way.omniumsplural of omniumomnivariousOf every variety.omnivicariousPermanently vicarious; shape-shifting; identity-grabbing.omnivoresplural of omnivoreomnivorousHaving a diet which is neither exclusively carnivorous nor exclusively herbivorous.omnivorousnessThe state of being omnivorous.omnivourousMisspelling of omnivorous.omohyoideus(anatomy) Synonym of omohyoid muscle.omophagousEating raw flesh; using uncooked meat as food.omphalitis(pathology) inflammation or infection of the umbilicusomphaloarteritisarteritis of the umbilicusomphalopagus(medicine, of conjoined twins) Joined at the umbilicus.omphalophlebitis(pathology) inflammation of an umbilical veinomphalosAn ancient religious stone artifact, or baetylus, used to denote the direction of the "center" of the world.omphaloscepsisAlternative form of omphaloskepsis.omphaloskepsisThe contemplation of or meditation upon one's navel; navel-gazing.omphalusAlternative form of omphalos.onagersplural of onageronagraceous(botany, relational) Of or relating to the family Onagraceae of flowering plants, including the fuchsia and the evening primrose.onanismsplural of onanismonanistsplural of onanistoncenessThe state or condition of being once; singularity.onchocerchiasisAlternative form of onchocerciasis.onchocerciasesplural of onchocerciasisonchocerciasis(pathology) A disease caused by a worm of the genus Onchocerca, especially as transmitted to humans by flies and often causing blindness; common in tropical Africa.onchocercosisSynonym of onchocerciasis.onchodermatitis(pathology) A form of dermatitis caused by filarial worms of the genus OnchocercaoncoapoptosisThe apoptosis of cancer cells, especially when induced therapeuticallyoncogenesplural of oncogeneoncogenesesplural of oncogenesisoncogenesis(medicine) The formation and development of tumors.oncogenetics(genetics, pathology) The study of the genetic origin of cancersoncogenicsThe study of the formation of tumours.oncogenomics(medicine) The study of the relationship between the genome of an individual and canceroncogenous(biology, medicine) Arising from or caused by a tumor.oncogeriatricsThe branch of geriatrics dealing with cancer in elderly patientsoncologistsplural of oncologistoncolysisThe breakdown or destruction of a tumour.oncophysicsThe physics of canceroncoproteogenomicsThe genomics of oncoproteogenomes.oncoproteomicsThe proteomics of oncoproteomes.oncoretrovirus(medicine) A retrovirus associated with a canceroncornavirusAny of a group of RNA viruses, of the subfamily Oncornvirinae in the family Retroviridae, that cause tumors in various animals and in humans.oncosisischemic cell death: a process characterized by mitochondrial swelling, cytoplasm vacuolization, and swelling of the nucleus and cytoplasmoncostsplural of oncostoncovirusA virus that can cause cancer.onefoldnessThe property of being onefold.onehandednessAlternative form of one-handedness.oneirocriticsplural of oneirocriticoneironauticslucid dreaming, the ability to explore dreams.oneirosisA form of light hypnosis.oneitis(slang) Attraction towards a single potential partner to the exclusion of other possible partners.onelinersplural of onelineroneliness(obsolete) The state of being one or single.oneness(uncountable) The state of being one or undivided; unity.onerousImposing or constituting a physical, mental, or figurative load which can be borne only with effort; burdensome.onerousnessThe state or characteristic of being onerous.onersplural of oneroneshotsplural of oneshotonesidednessAlternative form of one-sidedness.onesiesplural of onesieoneties(nonce word) The second decade of a century: the 1910s, the 2010s, etc. The tens.onglidesplural of onglideongoingnessThe condition of being ongoing; continuation; continuity.ongoingsplural of ongoingoniongrassAlternative form of onion grass.onionlessWithout onions.onionsplural of oniononkus(Australia, New Zealand, slang, dated) Inferior; unpleasant; unacceptably bad.onlinenessThe state or quality of being online.onliness(archaic) The state of being alone or unique.onloadsthird-person singular simple present indicative of onloadonlookersplural of onlookeronocleaceous(botany, relational) Of or relating to the Onocleaceae.onomasticsThe branch of lexicology devoted to the study of names and naming, especially the origins of names.onomatopoeiasplural of onomatopoeiaonomatopoeicsThe use of onomatopoeia.onomatopoeious(obsolete, rare) Of or pertaining to onomatopoeia.onomatopoesisonomatopoeiaonomatopoiesisonomatopoeiaonosSynonym of epinetron (“Attic pottery item”).onpass(transitive) To pass along or hand over.onrushesplural of onrushons(Singapore, Malaysia, transitive, colloquial) third-person singular simple present indicative of ononsetsplural of onsetonsides(sports) Onside: in a legal position with respect to the ball and boundariesonslaughtsplural of onslaughtontogenesesplural of ontogenesisontogenesisThe generation and development of an individual organism from fertilization to adulthood.ontologiesplural of ontologyontonomousPertaining to or characteristic of ontonomy; Involving the harmonious coexistence of disparate entities.onusA legal obligation.onusesplural of onusonwardnessProgress; advancement.onwardsthird-person singular simple present indicative of onwardonychinus(obsolete) onyxonychitisSynonym of onychia.onychocryptosis(medicine) ingrown toenailonychogryphosis(dermatology) A hypertrophy or excess growth of the nails.onychogryposisthickening and curvature of the nailsonycholysis(medicine) The loosening or separation of a fingernail or toenail from its bedonychomadesisPeriodic idiopathic shedding of the nails beginning at their proximal ends, possibly caused by the temporary arrest of the function of the nail matrix.onychomycosisFungal infection of the nail, especially the toenail.onychophoransplural of onychophoranonychoptosisSynonym of onychomadesis.onychorrhexis(pathology) fingernail and toenail brittleness and breakage, such as may be due to excessive strong soap and water exposure, nail polish remover, hypothyroidism, anemia, anorexia nervosa or bulimia, or after oral retinoid therapy.onychoschisis(pathology) A condition where the nails split into layers.onychosis(pathology) Any disease or disorder of the fingernails or toenails.onygenaceous(mycology) Belonging to the Onygenaceae.onyxitisAlternative form of onychitis.oocyesis(medicine, archaic, uncommon) Ovarian pregnancy: the type of ectopic pregnancy that occurs within an ovary.oocystsplural of oocystoocytesplural of oocyteoocytogenesisThe creation and development of oocytesoodles(originally US, informal, chiefly with "of") unspecified large amount, number, or quantity; lots, tons.oodlins(informal) Alternative form of oodles (“lots; a great number or amount”).oofiness(UK, slang, dated) The quality of being wealthy.oofless(UK, slang) Short of money; poor.oogamousOf or relating to oogamyoogenesesplural of oogenesisoogenesis(biology) The formation and development of an oocyte or ovumoogenus(taxonomy) An ootaxon, equivalent to a genus, used to classify fossilised dinosaur eggsoogoniumsplural of oogoniumoolitesplural of ooliteoolithsplural of oolithoolitiferous(obsolete, rare) Bearing oolite.oomiaksplural of oomiakoompahsthird-person singular simple present indicative of oompahoomphlessLacking oomph (vitality or sex appeal).oomyceteousAlternative form of oomycetous.oomycetesplural of oomyceteoomycetousRelating to, or characteristic of oomycetesoophagousRelating to or exhibiting oophagy.oophorectomiesplural of oophorectomyoophoritis(medicine) inflammation of the ovaries.oophorousContaining eggs or ova.oops(colloquial) Acknowledging a mistake.oospecies(taxonomy) An ootaxon, equivalent to a species, used to classify fossilised dinosaur eggsoospheresplural of oosphereoosporesplural of oosporeoosporiferousBearing oospores.oosporogenesisThe sporogenesis of oosporesoostasisThe failure of (typically insect) eggs to form or to developootidogenesis(biology) The part of oogenesis leading to the formation of ootidsoozesplural of oozeoozinessThe state or condition of being oozy.opacifiersplural of opacifieropacious(chiefly archaic) Opaque.opacitiesplural of opacityopacous(obsolete, chiefly poetic) Not shining or illuminated; dark.opacousness(obsolete) Opacity.opahsplural of opahopalsplural of opalopampsplural of opampopaquenessSynonym of opacity.opaquesplural of opaqueopcodesplural of opcodeopenersplural of openeropenessMisspelling of openness.openhandednessAlternative form of open-handedness.openheartednessAlternative form of open-heartedness.openingsplural of openingopenmindednessAlternative form of open-mindedness.openmouthednessThe state of having the mouth open, especially in astonishment.opennessThe degree to which a person, group, organization, institution, or society exhibits this liberal attitude or opinion.opennessesplural of opennessopensplural of openoperandsplural of operandoperantsplural of operantoperasplural of operaoperatesthird-person singular simple present indicative of operateoperaticsexaggerated or overly emotional behaviour; histrionicsoperationsplural of operationoperativeness(uncountable) The state or quality of being operative.operativesplural of operativeoperatorlessWithout an operator (person who operates); fully automatic.operatorsplural of operatoroperatress(dated) A female operator.operculiferous(zoology) Bearing an operculum.operculigenousProducing an operculum.operculigerousHaving an operculum.operculitis(dentistry) Inflammation (pericoronitis) of the operculum.operettasplural of operettaoperonsplural of operonoperoseness(archaic) The state of being operose; tedium.operousObsolete form of operose.opertaneous(obsolete) Concealed; private.opesthird-person singular simple present indicative of opeophiasis(dermatology) A form of alopecia areata characterized by the loss of hair in the shape of a wave at the circumference of the head.ophicleidesplural of ophicleideophidiansplural of ophidianophidiomycosis(pathology) Any disease caused by the fungus OphidiomycesophidiousArchaic form of ophidian.ophiocephalousophicephalousophiocordycipitaceous(mycology, relational) Of or relating to the Ophiocordycipitaceae.ophioglossaceous(botany) Belonging to the family Ophioglossaceae of ferns.ophiolatroussnake-worshippingophiolitesplural of ophioliteophiomorphous(archaic) Having the form or shape of a snake.ophiophagous(zoology) Feeding on snakes.ophiopluteus(zoology) A free-swimming larval stage of some brittle stars, having four pairs of rigid arms lined with cilia.ophiostomataceous(mycology) Belonging to the family Ophiostomataceae.ophitesplural of ophiteophiuroidsplural of ophiuroidophrysAny orchid of the genus Ophrys, often vernacularly called bee orchids.ophthalmicsOphthalmic studies or industry.ophthalmitisSevere conjunctivitis (inflammation of the conjunctiva).ophthalmomycosis(medicine) An eye disease caused by a fungus.ophthalmomyiasis(medicine, pathology) Myiasis of the eye.ophthalmoparesis(medicine) A partial or complete paralysis of the extraocular muscles which are responsible for eye movements.ophthalmoscopesplural of ophthalmoscopeophthalmoscopiesplural of ophthalmoscopyopiatesplural of opiateopiferous(rare) Bringing help; helpful.opiliaceous(botany, relational) Of or relating to the Opiliaceae.opinesthird-person singular simple present indicative of opineopiniastrous(obsolete) opinionatedopiniativenessThe quality of being opiniative.opinicus(heraldry) A heraldic imaginary creature with an eagle's head, a short tail, and sometimes wings.opinionatednessThe state or condition of being opinionated.opinionativenessQuality of being opinionative.opinionlessWithout an opinion or opinions.opinionlessnessAbsence of opinions.opinionsplural of opinionopioidsplural of opioidopiparous(obsolete) Sumptuous, luxurious.opisthobranchsplural of opisthobranchopisthocoelousconcave behind; applied especially to vertebrae in which the anterior end of the centrum is convex and the posterior concaveopisthodomos(Greek architecture) A porch at the rear of a temple, set against the blank back wall of the cella.opisthoglyphous(of a snake) Whose teeth include an enlarged pair at the back of the maxillae which normally angle backwards and are grooved to channel venom into the puncture.opisthognathous(zoology) Having retreating jaws or teeth.opisthorchiasisA parasitic disease caused by trematodes in the genus Opisthorchis.opisthotonos(medicine) Sustained tetanic spasm in which the body is bent backwards and stiffened, as produced by various diseases.opisthotonusAlternative form of opisthotonos.opless(Internet, IRC) Without ops (channel operators).opossumsplural of opossumoppilationsplural of oppilationopponens(anatomy) Short for opponens digiti minimi (“a muscle of the hand”).opponentsplural of opponentopportuneless(rare) Devoid of opportunity.opportunenessThe state or condition of being opportune.opportunistsplural of opportunistopportunitiesplural of opportunityopportunitylessDevoid of opportunity.opposednessQuality of being opposed.opposelessNot to be effectually opposed; irresistible.opposersplural of opposeropposesthird-person singular simple present indicative of opposeoppositenessThe state or condition of being opposite.oppositesplural of oppositeoppositifolious(botany) Placed at the same node with a leaf, but separated from it by the whole diameter of the stem.oppositionistsplural of oppositionistoppositionlesswithout oppositionoppositionsplural of oppositionoppositiousCharacterized by, or relating to, opposition; opposing.oppositipetalous(botany) Facing a petal.oppositisepalous(botany) Facing a sepal.oppositivenessThe quality of being oppositive.oppress(transitive) To keep down by unjust force.oppressesplural of oppressoppressionsplural of oppressionoppressivenessThe characteristic of being oppressive.oppressorsplural of oppressoropprobriousCausing opprobrium; offensive and shameful.opprobriousnessThe state or condition of being opprobrious.opprobriumsplural of opprobriumoppugnanciesplural of oppugnancyopsimathsplural of opsimathopsoclonus(pathology) Rapid, uncontrolled eye movementopsoniferousBearing opsonin.opsonisesthird-person singular simple present indicative of opsoniseopsonophagocytisMisspelling of opsonophagocytosis.opsonophagocytosisphagocytosis initiated by an opsoninopsophagos(literary or historical) A glutton, a gourmand, chiefly one who hogs and eats excessive amounts of fish.opticalsplural of opticalopticiansplural of opticianopticksObsolete form of optics.optics(physics) The physics of light and vision: basic optical science.optimatesplural of optimateoptimisesthird-person singular simple present indicative of optimiseoptimistsplural of optimistoptimizationsplural of optimizationoptimizersplural of optimizeroptimizesthird-person singular simple present indicative of optimizeoptionlessWithout an option.optionlessnessAbsence of options.optionsplural of optionoptoacousticsoptoacoustic interactions generallyoptocouplersplural of optocoupleroptodynamics(physics) A range of dynamic measurement techniques that use small lasers.optoelectronics(physics) The branch of physics that deals with the interaction of light with electronic devices, or the production of light from such devicesoptofluidicsThe science of optical devices incorporating fluids, especially such microfluidic devicesoptogenetics(genetics) A science that combines optics and genetics, aiming at controlling cellular processes with light. The cells are made responsive to light using genetics and then activated using specific wavelengths.optokinesisThe movement of the eye in response to an external stimulusoptomagnonics(physics) The study of optical magnonsoptomechanics(optics, mechanics) The design and manufacture of precision mechanical components of optical devicesoptomechatronicsThe integration of optical components and technology into mechatronic systems.optometersplural of optometeroptospintronics(physics) The (study of the) interaction of light with spin polarization (spintronics)optronicsoptoelectronicsoptsthird-person singular simple present indicative of optopulencesplural of opulenceopuntiaceous(botany, rare, obsolete) Belonging to the family Opuntiaceae (now mostly subfamily Opuntioideae in Cactaceae).opus(music) A work of music or set of works with a specified rank in an ordering of a composer's complete published works.opusesplural of opusorachesplural of oracheoraclesplural of oracleoraculous(now rare) Oracular.oraculousnessThe state or condition of being oraculous.oragious(archaic) stormyoralitiesplural of oralityoralnessThe quality or condition of being oral.orangeblossomsplural of orangeblossomorangelessWithout oranges.orangenessThe quality of being orange in colour.orangeriesplural of orangeryorangesplural of orangeoranginessThe quality or state of being orangey, as:orangishnessThe quality or state of being orangish: somewhat orange, orange-like, or somewhat like an orange.orangoutangsplural of orangoutangorangsplural of orangorangutangsplural of orangutangorangutansplural of orangutanorans(Christianity) The posture or bodily attitude of such a figure.orantesplural of oransoratesthird-person singular simple present indicative of orateorationsplural of orationoratoressAlternative form of oratress.oratoriansplural of oratorianoratoriesplural of oratoryoratoriosplural of oratoriooratorious(obsolete) oratoricaloratorsplural of oratororatress(dated) A female oratororbicularis(anatomy) A muscle surrounding an opening.orbiliaceous(mycology, relational) Of or relating to the Orbiliaceae.orbitalis(anatomy) A muscle that controls protrusion of the eyeball.orbitalsplural of orbitalorbitersplural of orbiterorbitostenosisstenosis of an orbit of the eyeorbitsplural of orbitorbivirusAny virus of the genus Orbivirus, many of which are carried by ticksorblessWithout an orb or orbs.orcasplural of orcaorcess(fantasy, mythology) A female orc.orchardgrassAny of various grasses of the genus Dactylis, especially Dactylis glomerata.orchardgrassesplural of orchardgrassorchardistsplural of orchardistorchardsplural of orchardorchesisThe act and/or art of dancing.orchesticsThe art of danceorchestralessWithout an orchestra.orchestrasplural of orchestraorchestratesthird-person singular simple present indicative of orchestrateorchestratorsplural of orchestratororchestrionsplural of orchestrionorchidaceous(botany) Of or pertaining to orchids.orchidectomiesplural of orchidectomyorchideousorchidaceousorchidistsplural of orchidistorchiditisAlternative form of orchitis.orchidsplural of orchidorchiectomiesplural of orchiectomyorchiesplural of orchieorchisAn orchid; now specifically, a plant of the genus Orchis.orchisesplural of orchisorchitis(pathology) A painful inflammation of one or both testes.orcos(rhetoric) Use of an oath to enhance the believability of a statement.ordainersplural of ordainerordainsthird-person singular simple present indicative of ordainordealsplural of ordealorderednessThe quality of being ordered, arranged in order.orderersplural of ordererorderingsplural of orderingorderlessDevoid of order or arrangement; chaotic.orderlessnessAbsence of order; chaos.orderliesplural of orderlyorderlinessThe fact of having a regular, proper and systematic arrangement.ordersplural of orderordinalsplural of ordinalordinancesplural of ordinanceordinariesplural of ordinaryordinarinessThe quality or condition of being ordinary.ordinatesplural of ordinateordinationsplural of ordinationordinesplural of ordoordnancesplural of ordnanceordosplural of ordoordurousFilthy; revolting.oreadesplural of oreadoreadsplural of oreadorebodiesplural of orebodyoremus(Roman Catholicism) A liturgical prayer.oreophilous(chiefly taxonomy) Mountain-loving; tending to inhabit mountains.oreosplural of oreoorexis(psychology) The affective and conative character of mental activity as contrasted with its cognitive aspect; the appetitive aspect of an act; desire, appetite.organdiesplural of organdyorganellesplural of organelleorganellogenesisThe creation and development of organellesorganellomics(biochemistry) The branch of cell biology that studies the structure and function of organelles in an organism.organicalnessThe quality or state of being organicorganicistsplural of organicistorganicnessThe quality of being organic.organicsplural of organicorganisationsplural of organisationorganisersplural of organiserorganisesthird-person singular simple present indicative of organiseorganismsplural of organismorganistsplural of organistorganizationsplural of organizationorganizersplural of organizerorganizesthird-person singular simple present indicative of organizeorganlessWithout organsorganlessnessAbsence of organs.organocatalysis(organic chemistry) The use of small organic compounds as catalystsorganogenesesplural of organogenesisorganogenesis(biology) the formation and development of the organs of an organism from embryonic cellsorganoidsplural of organoidorganometallicsplural of organometallicorganophorousMisspelling of organophosphorus.organophosphorousMisspelling of organophosphorus.organophosphorus(organic chemistry) describing any of a series of derivatives of phosphorus that have at least one alkyl or aryl group, especially one containing at least one carbon-phosphorus bondorganoponicsA system of urban agriculture using organic gardens, often low-level concrete walls filled with organic matter and soil, with lines of drip irrigation laid on the surface of the growing media.organotherapeuticsThe practice of organotherapy.organsplural of organorganzasplural of organzaorgasmlessWithout orgasm.orgasmsplural of orgasmorgiesplural of orgyorgillous(literary, archaic) Alternative spelling of orgulous (“arrogant, haughty, proud”)orguesplural of orgueorgulousArrogant, haughty, proud.oribisplural of oribiorichalceousPertaining to, or resembling, orichalch; having a colour or lustre like that of brass.orielsplural of orielorientalisesthird-person singular simple present indicative of orientaliseorientalismsplural of orientalismorientalistsplural of orientalistorientalsplural of orientalorientatesthird-person singular simple present indicative of orientateorientationsplural of orientationorientednessThe state or condition of being oriented; an orientation.orienteersplural of orienteerorientness(obsolete) brightness; splendour.orientsthird-person singular simple present indicative of orientorificesplural of orificeoriflammesplural of oriflammeoriginalnessThe state or condition of being original.originalsplural of originaloriginarinessThe quality of being originary.originatesthird-person singular simple present indicative of originateoriginativenessThe quality of being originative.originatorsplural of originatororiginatress(archaic) A female originator.originlessWithout an origin.originlessnessLack of an origin.originsplural of originoriolesplural of orioleoriscus(music) An ornamental neume of unclear meaning, usually found added to another neume as an auxiliary note.orishasplural of orishaorisonsplural of orisonormersplural of ormerornamentalnessThe quality of being ornamental.ornamentalsplural of ornamentalornamentationsplural of ornamentationornamentlessLacking ornamentationornamentlessnessAbsence of ornaments.ornamentsplural of ornamentornatenessThe state of being ornate.ornerinessThe state of being ornery.ornithischiansplural of ornithischianornithivorousfeeding on birdsornithochorous(biology, botany) Spread, or having seeds (in fleshy fruits) that are dispersed, by birds.ornithologistsplural of ornithologistornithomimus(paleontology) Any relatively small theropod dinosaur of the genus †Ornithomimus, the first genus of the ornithomimids to be described.ornithophagousThat feeds on birds.ornithophilousThriving in the presence of birds.ornithopodous(zoology) Having feet like those of a bird.ornithopodsplural of ornithopodornithorhynchusA platypus (genus Ornithorhynchus).ornithosis(medicine) A zoonotic infectious disease (of birds) caused by a bacterium called Chlamydia psittaci, it can be transmitted to humans and other animals. When carried by any species of bird belonging to the Psittacidae family (parrots), it is called psittacosis or parrot fever.orobanchaceous(botany) Belonging to the family Orobanchaceae, plants mostly parasitic on the roots of other plants.orocutaneous(anatomy) Relating to both the mouth and skin, as for example (a) a rash or lesion affecting both the oral mucosa and the perioral skin or (b) a fistula connecting the oral cavity to the skin of the cheek.orogenesis(geology) The process of mountain formation by deformation of the Earth's crust.orogeniesplural of orogenyorogenous(geology) Of or relating to mountain-building; orogenic.oropharyngesplural of oropharynxorophilous(botany) Liking a subalpine habitat.orphanagesplural of orphanageorphansplural of orphanorpharionsplural of orpharionorreriesplural of orreryorrisAny of several irises that have a fragrant root, especially Iris × germanica.orthesisAn orthopedic prosthesisorthiconsplural of orthiconorthoavulavirusAny avulavirus of the genus OrthoavulavirusorthobunyavirusAny of the genus Orthobunyavirus of bunyavirusesorthocephalousAlternative form of orthocephalic.orthocerasAny nautiloid cephalopod mollusc of the genus Orthoceras, known only as fossilsorthochronous(mathematics) Describing any Lorentz transformation or Galilean transformation which preserves the direction of timeorthodontics(medicine) A specialty of dentistry concerned with correcting misalignment of teeth.orthodontistsplural of orthodontistorthodoxiesplural of orthodoxyorthodoxnessThe state or condition of being orthodox.orthodromicsorthodromic navigationorthoepistsplural of orthoepistorthogamous(botany) Of or pertaining to orthogamyorthogenesis(evolutionary theory, historical) The hypothesis that evolution tends toward a certain goal, at least at some scales.orthogeneticsorthogenesisorthogenomics(genetics) The application of genomics to orthopedicsorthogeriatricsorthopaedics for geriatric patientsorthogeris(medicine, colloquial) Orthogeriatrics.orthognathous(anatomy) Straight-jawed.orthogneiss(geology) A gneiss derived from an igneous rock.orthographersplural of orthographerorthographiesplural of orthographyorthohantavirusAny member of the genus Orthohantavirus of single-stranded, enveloped, negative-sense RNA viruses.orthohepadnavirusAny virus of the genus OrthohepadnavirusorthohyperkeratosisSynonym of orthokeratosis.orthokeratosisHyperkeratosis without parakeratosis.orthokinesisA form of kinesis in which the speed of movement of the individual is dependent upon the intensity of the stimulus.orthologous(genetics, of genes or sequences) Exhibiting orthology; having been separated by a speciation event. Usually while retaining the same function.orthomixovirusMisspelling of orthomyxovirus.orthomyxovirus(virology) Any RNA virus of Orthomyxoviridae family characterised by having two long glycoprotein spikes.orthonairovirusAny virus of the genus OrthonairovirusorthoneurousExhibiting or relating to orthoneury.orthonymousOf, pertaining to, or being an orthonym.orthopaedics(British) Alternative spelling of orthopedics.orthopaedistsplural of orthopaedistorthopedics(medicine) The branch of medicine that deals with the prevention or correction of disorders of the bones and associated muscles and joints.orthopedistsplural of orthopedistorthophasmavirusAny RNA virus of the genus Orthophasmavirusorthophosphatesplural of orthophosphateorthopneumovirusAny virus of the genus Orthopneumovirus.orthopoxvirusAny of the genus Orthopoxvirus of poxviruses, including smallpox and many species isolated from mammals.orthoprosthesisAn orthodontic prosthesisorthopterous(zoology) Belonging to the Orthoptera.orthopticsThe study and treatment of muscular irregularities of the eye.orthoptistsplural of orthoptistorthoreovirusAny virus of the genus Orthoreovirus that infect vertebrates, normally without causing diseaseorthoretrovirusAny retrovirus of the subfamily Orthoretrovirinae.orthorrhaphousRelating to the orthorrhaphansorthorubulavirusAny virus of the genus Orthorubulavirus.orthosplural of orthoorthosesplural of orthosisorthosis(medicine) A type of brace which either prevents or assists movement of a limb or the spine.orthospermous(botany) Having the seeds straight, as in the fruits of some umbelliferous plants.orthostasis(sciences) The act or status of standing upright.orthostatesplural of orthostateorthostichous(botany) Having orthostichies.orthotactics(linguistics) The restrictions a language applies to the positions and patterns of graphemes in written words.orthotics(medicine) The design, manufacture and installation of orthopedic appliances to support, straighten or improve the function of a body partorthotistsplural of orthotistorthotomous(crystallography) Having two cleavages at right angles with one another.orthotonesisThe accentuation of a proclitic or enclitic.orthotonosmuscular rigidity associated with tetanusorthotonusAlternative form of orthotonos.orthotospovirusAny virus of the genus Orthotospovirusorthotrichaceous(botany, relational) Of or relating to the Orthotrichaceae.orthotropous(botany, of an ovule) Growing straight and having the micropyle at the apexorthros(Eastern Orthodoxy) The divine office or service at dawn.ortokeratosisMisspelling of orthokeratosis.ortolansplural of ortolanorycticsThe branch of geology relating to fossils.oryxesplural of oryxoryzavirusAny virus of the genus OryzavirusorzavirusMisspelling of oryzavirus.os(anatomy) Synonym of bone.oscarsplural of oscaroscillatesthird-person singular simple present indicative of oscillateoscillationlessWithout oscillation.oscillationsplural of oscillationoscillatoriaceous(bacteriology, relational) Of or relating to the Oscillatoriaceae.oscillatorsplural of oscillatoroscillogenesis(physiology) The generation of physiological oscillationsoscillogramsplural of oscillogramoscillographsplural of oscillographoscinesplural of oscineoscitanciesplural of oscitancyosculatesthird-person singular simple present indicative of osculateosculationsplural of osculationoseogenesisMisspelling of osteogenesis.oses(colloquial) The various sugars ending in -ose, such as sucrose, lactose, glucose, and fructose.osetogenesisMisspelling of osteogenesis.osiersplural of osierosmanthusAny of several widely distributed evergreen flowering plants, of the genus Osmanthus.osmicsThe scientific study of smells.osmious(chemistry) Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds.osmobiosisA form of cryptobiosis triggered by increased solute concentration in the solution in which the organism lives.osmocytosisendocytosis as a result of osmotic pressureosmohomeostasishomeostasis of osmotic pressureosmolaritiesplural of osmolarityosmolesplural of osmoleosmolysisThe rupture of a cell wall due to excessive osmotic pressureosmoregulationsplural of osmoregulationosmoresponsivenessThe quality or degree of being osmoresponsive.osmosesplural of osmosisosmosis(chemistry) The net movement of solvent molecules, usually water, from a region of lower solute concentration to a region of higher solute concentration through a partially permeable membrane.osmostressThe stress caused by (changes in) osmotic pressureosmotaxis(biology) movement of an organism in an osmotic pressure gradientosmoticsThe study and measurement of osmotic pressureosmotropotaxis(biology) tropotaxis in an osmotic gradientosmousAlternative form of osmious.osmundaceous(botany) Belonging to the family Osmundaceae of ferns.osmundsplural of osmundospreysplural of ospreyoss(dialectal) To set about, or intend be inclined to set about (doing something).osseinsplural of osseinosseocartilaginousAlternative form of osteocartilaginous.osseomusculocutaneousRelating to the bones, muscles, and skin.osseoseptocutaneousAlternative form of osteoseptocutaneous.osseousOf, relating to, or made of bone; bony.osseusMisspelling of osseous.ossiclesplural of ossicleossiferousContaining or yielding bone.ossifragesplural of ossifrageossifragous(archaic, rare) Serving to, or able to, break bones; bone-breaking.ossiphagousExhibiting ossiphagyossivorousBone-eating; of an animal, given to chewing on bones.ossuariesplural of ossuaryosteclastogenesisAlternative form of osteoclastogenesis.osteitidesplural of osteitisosteitis(pathology) inflammation of boneostensoriesplural of ostensoryostentaciousMisspelling of ostentatious.ostentatiousOf ostentation.ostentatiousnessThe property or characteristic of being ostentatious.ostentiousMisspelling of ostentatious.ostentous(obsolete) ostentatiousosteoarthritis(medicine) A form of arthritis, affecting mainly older people, caused by chronic degeneration of the cartilage and synovial membrane of the joints, leading to pain and stiffness.osteoarthrosisosteoarthritisosteoblastogenesis(biology) The production of osteoblastsosteoblastomasplural of osteoblastomaosteoblastosis(pathology) A disease associated with osteoblastsosteoblastsplural of osteoblastosteocartilagenousAlternative form of osteocartilaginous.osteocartilaginousRelating to or composed of bone and cartilage, or of osteocartilage.osteochemonecrosis(medicine) Medication-induced osteonecrosis, typically affecting the jaw.osteochondritis(pathology) inflammation of a bone and its cartilageosteochondrodysplasiasplural of osteochondrodysplasiaosteochondrogenesis(pathology) The genesis of osteochondrosisosteochondromatosis(medicine) Proliferation of osteochondromata, benign tumours containing both bone and cartilage and affecting mostly the extremities of the long bonesosteochondromatousRelating to osteochondromataosteochondrosis(pathology) A family of orthopedic diseases of the joint that occur in children and in rapidly growing animals, characterized by interruption of the blood supply of a bone, necrosis, and regrowth.osteochondrousSynonym of osteocartilaginous.osteoclasis(medicine) The surgical fracture of a bone in order to correct a deformityosteoclasteogenesisAlternative form of osteoclastogenesis.osteoclastogenesis(biology) The development of osteoclastsosteoclastsplural of osteoclastosteocutaneousRelating to or composed of bone and skin.osteocytesplural of osteocyteosteocytogenesisThe creation and development of osteocytesosteodermsplural of osteodermosteodonticsA combination of osteopathy and dentistryosteofibromatosis(medicine) Any syndrome of multiple osteofibromas, not specific to just a single disease entity in modern histopathology classifications.osteofibrosisfibrotic osteodystrophyosteofibrous(pathology, of tissue) Of combined osseous and fibrous type (within bone or within a tumor elsewhere).osteogenesesplural of osteogenesisosteogenesis(physiology) The formation and development of bone.osteogenousAlternative form of osteogenic.osteohistogenesisThe histogenesis of bone tissueosteohydatidosisA type of hydatidosis involving bone.osteoidosis(pathology) Any osteoid condition or diseaseosteokinematicsThe relative movement of two bones that articulate at a common jointosteoligamentous(anatomy) Relating to bone and ligamentosteologistsplural of osteologistosteolysisThe resorption or dissolution of bone tissue.osteomasplural of osteomaosteometricsplural of osteometricosteomyelitis(pathology) An infection of the boneosteomyocutaneousRelating to bone, muscle and skinosteonecrosis(pathology) Avascular necrosis.osteoodontokeratoprosthesisA form of keratoprosthesis using tooth and bone as supports.osteopathistsplural of osteopathistosteopathsplural of osteopathosteoperiostitisinflammation of a bone and its periosteumosteopetrorickets(pathology) osteopetrotic ricketsosteopetrosis(pathology) A rare hereditary disorder characterized by hard, dense bones.osteophageousAlternative form of osteophagous.osteophagousThat eats bones.osteophytesplural of osteophyteosteophytosis(medicine) The presence of osteophytesosteoplastiesplural of osteoplastyosteopoiesisThe creation and development of bone cellsosteopoikilosisA benign sclerosing dysplasia of bone characterized by the presence of numerous enostoses in the skeleton.osteoporosis(pathology) A disease, occurring especially in women following menopause, in which the bones become extremely porous and are subject to fracture.osteopsathyrosisFragility of the bones, or fragilitas ossium; a condition of softening of the bones, frequently accompanied by spontaneous fractures.osteoradionecrosisA possible complication following radiotherapy, where an area of bone does not heal from irradiation.osteosarcomagenesisThe genesis of osteosarcomataosteosarcomatousRelating to osteosarcoma.osteosclerosis(medicine) An increase in bone densityosteoseptocutaneous(anatomy) Relating to the bone, septum, and skin.osteosisosteogenesis; bone formationosteosynthesis(surgery) The reduction and fixation of a bone fracture with implantable devices, usually made of metalosteotechnicsThe technology of boneosteotendineousMisspelling of osteotendinous.osteotendinousRelating to (the connection between) bone and tendonsosteotomiesplural of osteotomyostiariesplural of ostiaryostiarius(Winchester College) A student office held by a prefect with the duties of keeping order, collecting the vulguses, and ensuring the other students attend class.ostinatosplural of ostinatoostitisArchaic form of osteitis.ostleressA female ostler.ostlersplural of ostlerostmarksplural of ostmarkostomiesplural of ostomyostosis(physiology) Synonym of osteosis.ostraceousResembling or characteristic of an oyster.ostracizesthird-person singular simple present indicative of ostracizeostracodermsplural of ostracodermostracodsplural of ostracodostreaceous(zoology) Of or pertaining to an oyster, or to a shell.ostreophagousoyster-eatingostrichesplural of ostrichostrichitis(humorous) A policy of keeping one's head in the sand, denying the reality of a problem or threat.ostriferousContaining or producing oysters.ostrobogulous(humorous) Slightly risqué or indecent; bizarre, interesting, or unusual.otapostasis(pathology) The condition of abnormally protruding earsotariesplural of otaryothergates(obsolete) In another manner.otherguess(archaic) Of another kind; different.otherlinessQuality of being otherly.otherness(uncountable) The quality of being different or distinct.othersplural of otherothertimesAlternative form of other times.otherwardsTowards an other or another direction.otherwaysOtherwise; by another means; in other respectsotherwhereas(obsolete) Elsewhere.otherwherenessThe quality of being somewhere else.otherwheresAlternative form of otherwhere.otherwhiles(archaic) At another time, or other times.otherwiseness(philosophy) The quality of being otherwise.otherworldlinessThe quality of being otherworldly.otherworldnessSynonym of otherworldliness.otiatricsThe study of diseases of the ear and their treatment.otiosenessQuality of being otiose.otitis(pathology) Inflammation of the ear.otoacariasisacariasis of the earotoacousticsThe science studying otoacoustic sounds.otocinclusAny of the species of small South American freshwater fish of the genus Otocinclus, popular in home aquariums.otocystsplural of otocystotolaryngologistsplural of otolaryngologistotolithsplural of otolithotologistsplural of otologistotomastoiditis(pathology) An inflammation of the mastoid air cells.otomycosis(pathology) a fungal infection in the outer canal of the earotoplastiesplural of otoplastyotorhinolaryngologistsplural of otorhinolaryngologistotosalpingitis(pathology) Inflammation of the Eustachian tube as a result of infectionotosclerosis(pathology) Sclerosis of the tissues of the labyrinth and middle ear.otoscopesplural of otoscopeotosyphilis(medicine) Otological syphilis: the otological component or manifestations of syphilis; syphilis's effects on the ears. In modern nosology not entirely distinct from the rest of neurosyphilis; sometimes formerly differentiated as, or in parallel with, parasyphilis.otterlessWithout otters.ottersplural of otterottomansplural of ottomanottosplural of ottooubliettesplural of oublietteouchesplural of oucheouchless(informal) Without pain.oughties(rare, humorous) A decade running from the first year of a century to the tenth.oughtness(chiefly philosophy) In ethics, the quality which makes an action dutiful or morally obligatory.oughtsplural of oughtouguiyasplural of ouguiyaouncesplural of ounceouns(archaic, dialectal) Wounds, especially the wounds of Christ on the cross.ouroboros(mythology) A serpent, dragon or worm that eats its own tail, a representation of the continuous cycle of life and death.oursThat or those belonging to us.ourselves(reflexive) Us; the group including the speaker as the object of a verb or preposition when that group also is the subject.oustersplural of ousterouststhird-person singular simple present indicative of oustoutagesplural of outageoutbalancesthird-person singular simple present indicative of outbalanceoutbidsthird-person singular simple present indicative of outbidoutbless(transitive) To surpass in giving blessings.outboardsplural of outboardoutboundsplural of outboundoutbravesthird-person singular simple present indicative of outbraveoutbreaksplural of outbreakoutbreedingsplural of outbreedingoutbreedsthird-person singular simple present indicative of outbreedoutbuildingsplural of outbuildingoutburstsplural of outburstoutcallsplural of outcalloutcastnessThe state or quality of being outcast.outcastsplural of outcastoutclass(transitive) to surpass something or somebody else, so as to appear to be in a higher classoutclassesthird-person singular simple present indicative of outclassoutcomesplural of outcomeoutcompass(transitive) To exceed the compass or limits of.outcriesplural of outcryoutcroppingsplural of outcroppingoutcropsplural of outcropoutcrossThe introduction of unrelated breeding stock to an existing population, especially one which is inbred or homogeneous.outcuss(US, colloquial) To outcurse.outdacious(dated, nonstandard) Pronunciation spelling of audacious.outdaciousness(dialectal) Audacity.outdatednessThe quality of being outdated.outdatesthird-person singular simple present indicative of outdateoutdoesthird-person singular simple present indicative of outdooutdoornessThe quality of being outdoor.outdoorsNot inside a house or under covered structure; unprotected; in the open air.outdoorsnessThe quality of being outdoors.outdrawsthird-person singular simple present indicative of outdrawoutdress(transitive) To dress better than.outergarmentsplural of outergarmentouternessThe quality of being outer.outersplural of outerouterthickness(graph theory) The minimum number of outerplanar subgraphs which a given graph can decompose into.outfieldersplural of outfielderoutfieldsplural of outfieldoutfightsthird-person singular simple present indicative of outfightoutfitsplural of outfitoutfittersplural of outfitteroutflowsplural of outflowoutgas(materials science) Gaseous substances released into the air, especially from a polymer material as it is aged or heated.outgasesthird-person singular simple present indicative of outgasoutgoersplural of outgoeroutgoingnessThe state or condition of being outgoing; gregariousness, extroversion.outgoingsplural of outgoingoutgross(intransitive) To make a larger gross income or profit than.outgroupsplural of outgroupoutgrowsthird-person singular simple present indicative of outgrowoutgrowthsplural of outgrowthoutguardsplural of outguardoutguess(transitive) To beat through accurate anticipation of someone's plans and actions.outguessesthird-person singular simple present indicative of outguessouthiss(transitive) To surpass in hissing.outhitsthird-person singular simple present indicative of outhitouthousesplural of outhouseoutingsplural of outingoutkiss(transitive) To surpass in kissing; to kiss more or better than.outlandersplural of outlanderoutlandishnessThe quality of being outlandish.outlandsplural of outlandoutlaststhird-person singular simple present indicative of outlastoutlawnessThe characteristic of being an outlaw.outlawsplural of outlawoutlaysplural of outlayoutletsplural of outletoutliernessThe property or degree of being an outlier.outliersplural of outlieroutlinelessWithout an outline.outlinesplural of outlineoutlivesthird-person singular simple present indicative of outliveoutlooksplural of outlookoutlyingness(statistics, of a data point, etc.) The measure, degree or quality of being an outlier.outmaneuversthird-person singular simple present indicative of outmaneuveroutmodednessThe condition of being outmoded.outmodesthird-person singular simple present indicative of outmodeoutnessThe quality of being out, or outside.outnumbersthird-person singular simple present indicative of outnumberoutpacesthird-person singular simple present indicative of outpaceoutpass(transitive) To surpass or exceed.outpatientsplural of outpatientoutperformsthird-person singular simple present indicative of outperformoutpiss(informal, transitive, vulgar) To urinate longer, higher, in a greater quantity, etc., than.outplacementsplural of outplacementoutplaysthird-person singular simple present indicative of outplayoutportsplural of outportoutpostsplural of outpostoutpouringsplural of outpouringoutpowersthird-person singular simple present indicative of outpoweroutpress(transitive, rare) To push or force outward.outprocessTo complete the required processes and paperwork in order to end a military tour of duty.outputsplural of outputoutputtersplural of outputteroutracesthird-person singular simple present indicative of outraceoutrageousViolating morality or decency; provoking indignation or affront.outrageousnessThe quality of being outrageous.outragesplural of outrageoutragiousArchaic spelling of outrageous.outranksthird-person singular simple present indicative of outrankoutreachesplural of outreachoutrenessAlternative form of outréness.outridersplural of outrideroutridesplural of outrideoutriggerlessWithout an outrigger.outriggersplural of outriggeroutrightnessQuality of being outright.outrunnersplural of outrunneroutrunsthird-person singular simple present indicative of outrunoutrushesthird-person singular simple present indicative of outrushoutsailsthird-person singular simple present indicative of outsailoutscoresthird-person singular simple present indicative of outscoreoutsellsthird-person singular simple present indicative of outselloutsertsplural of outsertoutsetsplural of outsetoutshinesthird-person singular simple present indicative of outshineoutsidenessThe state or condition of being outside.outsiderishnessQuality of being outsiderish.outsiderlinessQuality of being outsiderly.outsidernessThe state or condition of being an outsider.outsidersplural of outsideroutsidesplural of outsideoutskirtsThe area surrounding a city or town; suburb.outsmartsthird-person singular simple present indicative of outsmartoutspokennessThe quality of being outspoken.outspreadsthird-person singular simple present indicative of outspreadoutstandingnessThe quality or condition of being outstanding.outstandingsoutstanding amounts; unpaid debtsoutstationsplural of outstationoutstripsthird-person singular simple present indicative of outstripoutsurpass(transitive, nonstandard) To surpass or exceed.outswingersplural of outswingerouttakesplural of outtakeouttalksthird-person singular simple present indicative of outtalkoutvotesthird-person singular simple present indicative of outvoteoutwaitsthird-person singular simple present indicative of outwaitoutwalksthird-person singular simple present indicative of outwalkoutwardlookingnessAlternative form of outward-lookingness.outwardness(uncountable) The quality of being outward.outwardsFrom the interior toward the exterior; in an outward direction.outweighsthird-person singular simple present indicative of outweighoutwitsthird-person singular simple present indicative of outwitoutworkersplural of outworkeroutworksplural of outworkouzelsplural of ouzelovalbuminsplural of ovalbuminovalnessThe quality of being oval.ovalocytesplural of ovalocyteovalocytosiselliptocytosisovalsplural of ovalovariectomiesplural of ovariectomyovariesplural of ovaryovariocyesis(medicine, archaic, uncommon) Synonym of oocyesis.ovariolesplural of ovarioleovariosteresisSynonym of ovariectomy.ovariotomiesplural of ovariotomyovarious(now rare) Pertaining to or made up of eggs.ovaritis(pathology) inflammation of the ovaryovarylessLacking ovaries.ovationsplural of ovationovenlessWithout an oven, or without the use of an oven.ovensplural of ovenoverabstemiousExcessively abstemious.overachieversplural of overachieveroveractivenessQuality of being overactive.overactsthird-person singular simple present indicative of overactoveraddress(transitive) To address to an excessive degree.overadventurousExcessively adventurous.overagenessThe quality of being overage.overagesplural of overageoveraggressivenessExcessive aggression.overalertnessThe quality of being overalert.overalls(UK) A loose-fitting garment worn over regular clothes to protect them.overambitiousExcessively ambitious.overambitiousnessThe quality of being overambitious.overanalysisAn analysis carried too far; the act or process of overanalyzing.overanxiousExcessively anxious or nervous.overanxiousnessQuality of being overanxious.overarchesthird-person singular simple present indicative of overarchoverarchingnessThe condition of being overarching.overassertivenessThe quality of being overassertive.overassessTo assess too often.overassessesthird-person singular simple present indicative of overassessoverattentivenessThe quality of being overattentive.overavariciousExcessively avaricious.overbalancesthird-person singular simple present indicative of overbalanceoverbashfulnessExcessive bashfulness.overbearingnessQuality of being overbearing.overbigness(rare, nonstandard) The quality of being too big; excessive size.overbitesplural of overbiteoverbitternessExcessive bitterness.overblownnessThe state or quality of being overblown.overboisterousExcessively boisterous.overboldnessThe state or fact of being too bold; audacity.overbootsplural of overbootoverbossA boss of underbosses in a criminal organization.overbounteousExcessively bounteous.overbrightnessExcessive brightness.overbroadnessThe quality of being too broad.overbuildsthird-person singular simple present indicative of overbuildoverbumptiousExcessively bumptious.overburdenednessThe state or condition of being overburdened.overcallsthird-person singular simple present indicative of overcallovercaptiousExcessively captious.overcarefulnessExcessive carefulness.overcarelessExcessively careless.overcarelessnessExcessive carelessness.overcastnessThe quality of the weather being overcast.overcastsplural of overcastovercautiousExcessively cautious.overcautiousnessExcessive cautiousness.overchargesthird-person singular simple present indicative of overchargeovercheapnessExcessive cheapness.overclassA powerful, privileged social class.overcleanlinessExcessive cleanliness.overclevernessExcessive cleverness.overclocksthird-person singular simple present indicative of overclockoverclosenessExcessive closeness.overclothesItems of clothing worn as an outer layer.overcloudsthird-person singular simple present indicative of overcloudovercoatingsplural of overcoatingovercoatlessWithout an overcoat.overcoatsplural of overcoatovercomersplural of overcomerovercomesthird-person singular simple present indicative of overcomeovercommitmentsplural of overcommitmentovercompensatesthird-person singular simple present indicative of overcompensateovercompetitivenessThe quality of being overcompetitive.overcompletenessThe condition of being overcompleteovercomplicatednessThe quality of being overcomplicated.overcompress(transitive) To compress too much.overconnectednessThe quality or condition of being overconnected.overconscientiousExcessively conscientious.overconscientiousness(rare) The state of being overconscientious.overconsciousExcessively conscious.overconsciousnessExcessive consciousness of something.overcontiguousSynonym of overlapping.overcooksthird-person singular simple present indicative of overcookovercopiousExcessively copious.overcorrectionsplural of overcorrectionovercorrectsthird-person singular simple present indicative of overcorrectovercourageousExcessively courageous.overcourteousExcessively courteous.overcovetousExcessively covetous.overcoynessExcessive coyness.overcredulousToo credulous; excessively gullible.overcriticalnessThe quality of being overcritical.overcropsthird-person singular simple present indicative of overcropovercross(transitive) to cross over; traverseovercrowdednessThe property of being overcrowded.overcuriousExcessively curiousovercuriousnessExcessive curiousness.overcutenessThe quality of being overcute; excessive cuteness.overdeliciousExcessively delicious.overdepress(transitive) To depress excessively.overdesirousExcessively desirous.overdestructivenessExcessive destructiveness.overdevelopednessThe quality of being overdeveloped.overdevelopsthird-person singular simple present indicative of overdevelopoverdiagnosis(medicine) The act or process of diagnosing something too frequently, or based on insufficient evidence, or without benefit to the patient; an instance of this act or process.overdiscussTo discuss too long or too often.overdiuresis(medicine) Excessive diuresis, typically causing inappropriate polyuria and thus potentially dehydration and electrolyte imbalances.overdoesthird-person singular simple present indicative of overdooverdogsplural of overdogoverdonenessQuality of being overdone.overdosesplural of overdoseoverdoss(intransitive, UK, slang, trainspotting) To oversleep, thus missing the intended railway stop.overdraftsplural of overdraftoverdramaticsExcessive dramatics.overdress(intransitive) To wear too many clothes for a particular occasion.overdressesthird-person singular simple present indicative of overdressoverdressinessThe quality of being overdressy.overdyesthird-person singular simple present indicative of overdyeovereagernessThe quality of being overeager; excessive readiness or enthusiasm.overearnestnessThe quality of being overearnest.overeasinessExcessive easiness.overeatersplural of overeaterovereatsthird-person singular simple present indicative of overeatovereffusivenessThe quality of being overeffusive.overelaboratenessThe state or condition of being overelaborate.overemphasisExcessive emphasis.overemphasizesthird-person singular simple present indicative of overemphasizeoverestimationsplural of overestimationoverexactnessQuality of being overexact.overexplicitnessThe quality of being overexplicit.overexposesthird-person singular simple present indicative of overexposeoverexposuresplural of overexposureoverexpress(genetics, transitive) To artificially express (a gene) in increased quantity.overextensionsplural of overextensionoverfastidiousExcessively fastidious.overfastidiousness(rare) The state of being overfastidious.overfatiguesthird-person singular simple present indicative of overfatigueoverfearfulnessExcessive fearfulness.overfillsthird-person singular simple present indicative of overfilloverfinenessexcessive finenessoverfishesthird-person singular simple present indicative of overfishoverfloridnessExcessive floridness.overflowingnessQuality of being overflowing; exuberance.overflowsplural of overflowoverfocusTo focus excessively (on a particular subject to the exclusion of others)overfondnessExcessive fondness.overforwardnessThe quality of being overforward.overfranknessExcessive frankness.overfriendlinessThe quality of being too friendlyoverfullnessThe state of being excessively or abnormally full.overfuriousExcessively furious.overgeneralizationsplural of overgeneralizationovergeneralizesthird-person singular simple present indicative of overgeneralizeovergenerousgenerous to an excessive degreeovergloriousExcessively glorious.overgloss(transitive) To make (paper, etc.) too glossy.overgluttonousExcessively gluttonous.overgraciousExcessively gracious.overgrazesthird-person singular simple present indicative of overgrazeovergreatnessexcessive greatnessovergreedinessExcessive greediness.overgrievousExcessively grievous.overgrossExcessively gross.overgrossnessExcessive grossness.overgrownnessThe state of being overgrown.overgrowsthird-person singular simple present indicative of overgrowoverhangsplural of overhangoverhappinessexcessive happinessoverharass(transitive) To harass excessively.overhardnessExcessive hardness.overharshnessExcessive harshness.overhastinessThe quality of being overhasty.overhaulsplural of overhauloverheadsplural of overheadoverhearsthird-person singular simple present indicative of overhearoverheatednessThe quality of being overheated.overheatsthird-person singular simple present indicative of overheatoverheavinessExcessive heaviness.overhours(dated) Additional hours worked; overtime.overimaginativenessThe quality of being overimaginative.overimpress(transitive) To impress too much.overinclusivenessThe quality of being overinclusive.overindebtednessThe quality of being too deeply in debt.overindulgesthird-person singular simple present indicative of overindulgeoverindustriousAlternative form of over-industrious.overingeniousToo ingenious.overinterestednessThe quality of being excessively interested in something.overjealousExcessively jealous.overjoyfulnessThe state of being overjoyfuloverjoyous(rare) Extremely happy or celebratory; overjoyed.overjoysthird-person singular simple present indicative of overjoyoverjudiciousExcessively judicious.overkeennessExcessive keenness.overkindnessExcessive kindness.overlandersplural of overlanderoverlappingsplural of overlappingoverlapsplural of overlapoverlargenessThe quality of being overlarge; excessive size or bulk.overlasciviousExcessively lascivious.overlavishnessQuality of being overlavish.overlaxnessExcessive laxness.overlayersplural of overlayeroverlaysthird-person singular simple present indicative of overlayoverleapsthird-person singular simple present indicative of overleapoverlearnednessExcessive learning; the quality or state of being overlearned.overlicentiousExcessively licentious.overliesthird-person singular simple present indicative of overlieoverliness(obsolete) The quality or state of being overly.overlitigiousExcessively litigious.overlivelinessExcessive liveliness.overloadednessThe quality or condition of being overloaded.overloadsplural of overloadoverlookersplural of overlookeroverlooksthird-person singular simple present indicative of overlookoverloquaciousExcessively loquacious.overloquaciousnessThe quality of being overloquacious.overlordlinessThe fact or quality of being overlordly; superciliousness.overlordsplural of overlordoverlordshipsplural of overlordshipoverloudnessQuality of being overloud.overluminous(astronomy) More luminous than an equivalent star of the main sequenceoverlusciousExcessively luscious.overluxuriousExcessively luxurious.overmansthird-person singular simple present indicative of overmanovermantelsplural of overmantelovermasterfulnessExcessive masterfulness.overmatchesplural of overmatchovermeeknessExcessive meekness.overminutenessExcessive minuteness.overmuchness(dated) The quality or state of being in excess; superabundance.overneatnessExcessive neatness.overnervousExcessively nervous.overnervousnessExcessive nervousness.overnessThe quality of being over (finished, elapsed, concluded).overnicenessThe quality of being overnice.overnightersplural of overnighterovernightsplural of overnightovernumerousness(rare) The quality or condition of being too numerous.overobsequiousExcessively obsequious.overobsequiousnessExcessive obsequiousness.overobviousExcessively obvious.overofficiousExcessively officious or inclined to meddle.overpassA section of a road or path that crosses over an obstacle, especially another road, railway, etc.overpassesplural of overpassoverpaymentsplural of overpaymentoverpermissivenessExcessive permissiveness; the quality of being overpermissive.overpiousExcessively pious.overplenteousExcessively plenteous.overplumpnessExcessive plumpness.overplusThat which remains beyond what is necessary or required; a surplus.overpompousExcessively pompous.overponderousExcessively ponderous.overpopulationsplural of overpopulationoverpopulousExcessively populous.overpopulousnessThe quality of being overpopulous.overpowerednessThe quality of being overpowered (subdued by superior force).overpowerfulnessThe quality of being overpowerful.overpoweringnessThe quality of being overpowering.overpowersthird-person singular simple present indicative of overpoweroverpreciousExcessively precious; contrived, artificial.overprecisenessThe quality of being overprecise.overpress(transitive) To bear upon (someone or something) with irresistible force; to crush, to overwhelm.overpressuresplural of overpressureoverpresumptuousExcessively presumptuous.overpricesthird-person singular simple present indicative of overpriceoverprintsplural of overprintoverprivilegednessThe quality of being overprivileged.overprocess(transitive) To process to too great a degree.overproducesthird-person singular simple present indicative of overproduceoverproductionsplural of overproductionoverpronenessThe quality of being excessively prone to something.overproportionsthird-person singular simple present indicative of overproportionoverprosperousExcessively prosperous.overprotectivenessThe state or condition of being overprotective.overpunctiliousExcessively punctilious.overquietnessExcessive quietness.overranknessExcessive rankness.overrashnessExcessive rashness.overratednessThe quality of being overrated.overratesthird-person singular simple present indicative of overrateoverreachersplural of overreacheroverreachesplural of overreachoverreachingnessThe quality of being overreaching.overreactionsplural of overreactionoverreadinessThe condition of being overreadyoverreligiousExcessively religious.overresponsivenessThe quality of being overresponsive.overrichnessQuality of being overrich.overridersplural of overrideroverridesthird-person singular simple present indicative of overrideoverrighteousExcessively righteousoverrigorousExcessively rigorous.overripenessThe state or condition of being overripe.overroughnessExcessive roughness.overrulesthird-person singular simple present indicative of overruleoverrunsthird-person singular simple present indicative of overrunoversplural of overoversaltinessThe quality of being oversalty.overscrupulousExcessively scrupulous.overscrupulousnessThe quality of being overscrupulous.overseasAbroad, especially across the sea.overseeressA female overseer.overseersplural of overseeroverseesthird-person singular simple present indicative of overseeoversensitivenessThe characteristic of being oversensitive.oversententiousExcessively sententious.overseriousExcessively serious.overseriousnessQuality of being excessively serious.oversetsthird-person singular simple present indicative of oversetoversexednessThe quality of being oversexed.overshadowsthird-person singular simple present indicative of overshadowoversharpnessExcessive sharpness.overshoesplural of overshoeovershootsthird-person singular simple present indicative of overshootoversightsplural of oversightoversizednessThe state or quality of being oversized.overskies(science fiction) interplanetary, intergalactic.oversleepsthird-person singular simple present indicative of oversleepoverslownessExcessive slowness.oversmoothnessExcessive smoothness.oversocksplural of oversockoversoftnessExcessive softness.oversolicitousExcessively solicitous.oversolicitousnessExcessive solicitousness.overspaciousExcessively spacious.overspaciousnessExcessive spaciousness.overspecializesthird-person singular simple present indicative of overspecializeoverspreadsthird-person singular simple present indicative of overspreadoversqueamishnessThe quality of being oversqueamish.overstatednessthe state or quality of being overstated.overstaysthird-person singular simple present indicative of overstayoversteersplural of oversteeroverstepsthird-person singular simple present indicative of overstepoverstiffnessExcessive stiffness.overstrainsthird-person singular simple present indicative of overstrainoverstrenuousExcessively strenuous.overstrenuousnessThe quality of being too strenuous.overstressTo place excessive emphasis on something.overstressesthird-person singular simple present indicative of overstressoverstrictnessQuality of being overstrict.overstridesthird-person singular simple present indicative of overstrideoverstudiousnessExcessive studiousness.oversuds(transitive) To cause (a washing machine) to fill with too much suds.oversuperstitiousExcessively superstitious.oversurenessThe state of being oversureoversuspiciousExcessively suspicious; having a level of suspicion that is not warranted by circumstances.oversweetnessQuality of being oversweet.oversynthesis(biochemistry) The excessive synthesis of a compound by an organismovertakesthird-person singular simple present indicative of overtakeovertalkativenessThe quality of being overtalkative.overtautnessExcessive tautness.overtediousExcessively tedious.overtenaciousExcessively tenacious.overtendernessExcessive tenderness.overtensenessExcessive tenseness; overtension.overthings(dated) An extra layer of outer clothing or winter garments for use in very cold weather, possibly including a blanket or shawl, to be wrapped around the body or hung over the shoulders and back.overthoughtfulnessThe quality of being overthoughtful.overthriftinessExcessive thriftiness.overthrowsthird-person singular simple present indicative of overthrowoverthwartness(obsolete) The state of being overthwart; perverseness.overtightnessExcessive tightness.overtimesplural of overtimeovertimorousExcessively timorous.overtimorousnessExcessive timorousness.overtirednessThe state of being overtired; exhaustion.overtnessThe state of being overt; openness.overtonesplural of overtoneovertradesthird-person singular simple present indicative of overtradeovertrainsthird-person singular simple present indicative of overtrainovertrousersTrousers to be worn over a similar inner garment.overturesplural of overtureoverturnsthird-person singular simple present indicative of overturnoverusesthird-person singular simple present indicative of overuseovervaluednessThe state or condition of being overvalued.overventurousExcessively venturous.overviewsplural of overviewovervigorousExcessively vigorous.overvoltagesplural of overvoltageoverwearsthird-person singular simple present indicative of overwearoverweeningnessThe quality of being overweening.overweighsthird-person singular simple present indicative of overweighoverweightednessQuality of being overweighted.overweightnessThe quality of being overweight.overweightsthird-person singular simple present indicative of overweightoverwetnessExcessive wetness.overwhelmednessThe quality of being overwhelmed.overwhelmingnessThe property of being overwhelming.overwhelmsthird-person singular simple present indicative of overwhelmoverwintersthird-person singular simple present indicative of overwinteroverwordinessExcessive wordiness.overworksthird-person singular simple present indicative of overworkoverwritesthird-person singular simple present indicative of overwriteoverwroughtnessThe property of being overwrought.overzealousToo zealous; too enthusiastic or fervent.overzealousnessThe quality of being too zealousovicidesplural of ovicideoviductsplural of oviductoviferousProducing or bearing eggs.ovigenesisSynonym of oogenesis.ovigenous(biology) that produces ova or eggsovigerouscarrying or bearing eggs.oviparousDepositing eggs that develop and hatch outside the body as a reproductive strategy.oviparousness(biology) The quality of being oviparous; oviparity.oviviviparousAlternative form of ovoviviparous.ovococcus(microbiology) An ellipsoid-shaped bacteriumovogenesisSynonym of oogenesis.ovonicsA form of electronics that uses materials able to change from an electrically non-conducting state to a semiconducting state shown by glass of special composition upon application of a certain minimum voltage.ovotestesplural of ovotestisovotestis(biology) A gonad with characteristics of both ovaries and testicles. Considered an intersex condition in humans and some other animals.ovoviviparousOf or pertaining to such kind of animals such as some reptiles whose eggs hatch inside their bodyovoviviparousnessThe quality of being ovoviviparous.ovulationsplural of ovulationovulesplural of ovuleovuliferousBearing ovules.owdaciousPronunciation spelling of audacious.owdaciousnessPronunciation spelling of audaciousness.owednessThe state or quality of being owed.owersplural of owerowesthird-person singular simple present indicative of oweowiesplural of owieowings(rare) That which is owed; debt.owleriesplural of owleryowletsplural of owletowlinessThe condition of being an owl or having owllike characteristics.owlishnessThe state or condition of being owlish.owllessLacking owls; without an owl.ownednessThe quality of being owned.owneress(rare, dated) A female owner.ownerlessHaving no owner.ownerlessnessQuality of being ownerless.ownersplural of ownerownershipsplural of ownershipownings(rare) Things owned; possessions.ownnessThe property of being one's own.ownsthird-person singular simple present indicative of ownoxacillinsplural of oxacillinoxalatesplural of oxalateoxalidaceous(botany) Of or relating to the family Oxalidaceae of wood sorrel and its close relatives.oxalis(horticulture) Any of various ornamental flowering plants of the genus Oxalisoxalisesplural of oxalisoxalosisThe deposition of oxalate within the body.oxazolesplural of oxazoleoxazolidinedionesplural of oxazolidinedioneoxbowsplural of oxbowoxcartsplural of oxcartoxeyesplural of oxeyeoxfordsplural of oxfordoxheartsplural of oxheartoxidantsplural of oxidantoxidasesplural of oxidaseoxidesplural of oxideoxidisersplural of oxidiseroxidisesthird-person singular simple present indicative of oxidiseoxidizersplural of oxidizeroxidizesthird-person singular simple present indicative of oxidizeoxidoreductasesplural of oxidoreductaseoximesplural of oximeoximetersplural of oximeteroxless(rare) Having no ox or oxen.oxlipsplural of oxlipoxolipidomicsoxylipidomicsoxpeckersplural of oxpeckeroxtailsplural of oxtailoxtersplural of oxteroxycephaliesplural of oxycephalyoxydasesplural of oxydaseoxyferrous(chemistry) Containing both oxygen and ferrous ironoxygenasesplural of oxygenaseoxygenatorsplural of oxygenatoroxygenisesthird-person singular simple present indicative of oxygeniseoxygenizesthird-person singular simple present indicative of oxygenizeoxygenlesslacking oxygenoxygenous(obsolete) oxygenicoxygnathousHaving a smooth jawoxyhemoglobinsplural of oxyhemoglobinoxylipidomics(biochemistry) The lipidomics of oxylipidsoxymoronicness(nonce word, rare) The state, quality or measure of being oxymoronic.oxymoronsplural of oxymoronoxymorous(rare) Synonym of oxymoronic.oxyrhynchousHaving a pointed snout.oxyrhynchus(ichthyology) a fish with a pointed snoutoxytaxis(biology) movement or orientation towards a supply of oxygenoxytocicsplural of oxytocicoxytocinsplural of oxytocinoxytonesplural of oxytoneoxytonesis(phonology) The shift of accent to the final syllable.oxyuriasispinworm infection; enterobiasisoysterbedsplural of oysterbedoystercatchersplural of oystercatcheroysterishnessQuality of being oysterish.oysterlessWithout oysters.oysterousResembling or relating to oysters.oysterplantsplural of oysterplantoystersplural of oysteroystershellsplural of oystershellozonelesswithout ozoneozoniferousYielding or bearing ozone.ozonizersplural of ozonizerozonizesthird-person singular simple present indicative of ozonizeozonolysis(chemistry) Any reaction with ozone, especially to a double bond, in which cleavage of a bond occurs.ozonousArchaic form of ozonic.ozsplural of oz; ounces