Browse Other O Word Lengths
6-Letter O Words by Ending Letter
All 715 6-Letter Words Starting With O
oafdomThe state or condition of an oaf; oafishness.oafishCharacteristic of or resembling an oaf; clumsy, stupid.oakletA little oak tree.oaktag(uncountable) A flexible material akin to thick paper.oarageEquipment used for rowing.oaringpresent participle and gerund of oaroarlopObsolete form of orlop.oarmanAlternative form of oarsman.oaseanOf or relating to an oasis.oatersplural of oater.oatiercomparative form of oaty: more oatyoaxacaAlternative form of Oaxaca (the cheese)obasanA Japanese middle-aged woman.obcellA hypothetical proto-organism consisting of a cup-shaped half-cell.obduce(obsolete) To cover.obduct(geology) To push over or on top of, such as one tectonic plate being pushed over another.obdure(obsolete) Synonym of obdurate.obeahsplural of obeahobeast(religion) An intelligent demonic influence or entity.obecheTriplochiton scleroxylon, a tropical tree of Africa.obeismAlternative form of obiism.obelia(zoology) Any of various colonial marine hydroids of the genus Obelia.obelicRelating to an obelus or typographical daggerobelin(biochemistry) A calcium-regulated bioluminescent photoprotein from marine organisms of the genus Obelia.obelusA 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.obentoAlternative form of bento.oberekA lively Polish dance with many lifts and jumps.obeyedsimple past and past participle of obeyobfirm(transitive, obsolete) To make firm or stubborn.obiismBelief in, or the practice of, the obeah superstitions and rites.obital(obsolete) Of or relating to an obit.obiter(formal) Incidentally; in passing.objectA thing that has physical existence but is not alive.objure(rare) To swear an oath.oblastA region or province in Slavic or Slavic-influenced countries.oblateA child given up by its parents into the keeping or dedication of a religious order or house.oblige(transitive) To constrain someone by force or by social, moral or legal means.oblikeObsolete form of oblique.obloidoblong in three dimension(s)oblongHaving a length and width that are different; not square or circular.oboist(music) Someone who plays an oboe.obolid(zoology) Any member of the family Obolidae of lamp shells.obolosAlternative form of obolus.obolusA silver coin minted in Ancient Greece, valued at a sixth of a drachma.oboval(botany, rare) obovateobsesh(Internet slang) Obsession.obsess(passive voice, constructed with "with") To be preoccupied with a single topic or emotion.obsign(obsolete) To seal; to confirm, as by a seal or stamp.obtain(transitive) To get hold of; to gain possession of, to procure; to acquire, in any way.obtect(entomology, of a pupa) Having the legs and other appendages more or less strongly cemented to the body.obteinObsolete form of obtain.obtend(obsolete) To oppose; to hold out in opposition.obtest(archaic, ambitransitive) To implore, beseech, plead, beg.obteynObsolete form of obtain.obtund(transitive, chiefly medicine) To reduce the edge or effects of; to mitigate; to dull.obtuse(now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form.obvert(transitive) To turn so as to show another side.occamy(obsolete) An alloy imitating gold or silver.occhio(rare) A sound holeoccult(transitive, astronomy) To cover or hide from view.occupy(transitive, of time) To take or use.occursthird-person singular simple present indicative of occuroceansplural of oceanoceanyCharacteristic of the ocean.ocebobA hybrid of an ocelot and a bobcat.ocelliplural of ocellusocelotAn American feline carnivore (Leopardus pardalis, syn. Felis pardalis) covered with blackish ocellated spots and blotches which are variously arranged.ochava(historical) A traditional Spanish unit of mass, equivalent to about 3.6 g.ochersplural of ocherochimyObsolete form of occamy.ochokoSynonym of choko (“handleless cup for saké”).ochone(Scotland, Ireland) Expresses woe or sorrow.ochrea(botany) Alternative form of ocrea.ochresplural of ochreochreyAlternative form of ochery.ochric(soil science) Either too thin, too light in colour, or too low in organic matter to be considered either mollic or umbric.ochroeObsolete spelling of okra.ockardPronunciation spelling of awkward.ockerdPronunciation spelling of awkward.ocracy(rare) Any of various forms of government or rule as designated by words ending in -ocracy.ocreaeplural of ocreaoctaneoctane numberoctansplural of octanoctantThe eighth part of a circle; an arc of 45 degrees.octave(music) An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch frequency.octavo(printing) A book of octavo pages.octene(organic chemistry) Any of many isomeric alkenes having eight carbon atoms and one double bond; some of them are used in the manufacture of polymersoctetsplural of octetoctett(rare) Alternative spelling of octet.octile(statistics) Any of the quantiles that divide an ordered sample population into eight equally numerous subsets.octium(chemistry) The element oxygen.octlet(computing) A word (or rather, a doubleword) consisting of eight bytes (64 bits)octoadSynonym of ogdoad (“a thing made up of eight parts”).octode(dated, electronics) A thermionic valve that has eight electrodes or similar elementsoctoic(chemistry) Pertaining to, derived from, or resembling octane; used mostly to designate any of a group of acids including caprylic acid.octoid(engineering) Being a form of gear or tooth that resembles the involute, but whose complete path of contact on the surface of a sphere is in the form of a figure eight.octopi(nonstandard, hypercorrect) plural of octopusoctose(biochemistry) A sugar or saccharide containing eight carbon atoms.octoyl(organic chemistry) A hypothetical radical, C₈H₁₅O, regarded as the essential residue of octoic acid.octreeA treelike data structure each of whose nodes has up to eight children, most often used to partition a three-dimensional space by recursively subdividing it.octroi(historical) A tax levied in money or kind at the gate of a French city on articles brought within the walls.octroyTo grant (a privilege etc, by a government etc).octuor(music, obsolete) Synonym of octet (“a composition for eight instruments or voices”).octyne(organic chemistry) Any of many isomeric alkynes having eight carbon atoms and one triple bondocularOf, or relating to the eye, or the sense of sightoculus(architecture) A window or other opening that has an oval or circular shape (as of an eye).odachiA long, large Japanese sword.odacid(ichthyology) Any of the family Odacidae of perciform fishesodangoA Japanese sweet round dumpling made from mochiko (rice flour), eaten off a stick. Related to mochi.oddbodAlternative spelling of odd bod.oddestsuperlative form of odd: most oddoddifyTo cause to appear strange.oddity(countable) An odd or strange thing or opinion.oddjobAlternative form of odd job.oddmanAlternative form of odd man (“one who does odd jobs”).odeionAlternative form of odeon.odeletA little or short ode.odhaniA type of small sari worn over other clothing.odible(obsolete) Fit to excite hatred; hateful, odious.odiousArousing or meriting strong dislike, aversion, or intense displeasure.odistsplural of odistodizedsimple past and past participle of odizeodonymAn identifying name given to a street; a street name.odoredHaving an odor, especially having a specified odor.odoursplural of odourodylic(pseudoscience, historical) Of or pertaining to the od or odyle (“a hypothetical force or natural power, now proved not to exist, which was supposed by Carl Reichenbach and others to inhere in certain people and produce phenomena such as animal magnetism and mesmerism, and to be developed by various agencies, as by chemical or vital action, heat, light, magnets, etc.”).oecist(Ancient Greece) A founder of a colony.oecium(zoology) The household common to the individuals of a compound organism.oedema(Commonwealth spelling) Standard spelling of edema.oekaki(Internet) A drawing-based message board system, sometimes allowing users to replay a stroke-by-stroke animation of the picture being drawn.oekistAlternative form of oecist.oenachAlternative form of aonach.oenite(mineralogy) An orthorhombic silver white mineral containing antimony, arsenic, and cobalt.oeuvreA work of art, music or literature.offald(dialectal, Northern England) vile, wicked, meanoffalsplural of offaloffalyAlternative form of offally.offcap(rare or obsolete) To take off the cap by way of obeisance or salutation.offcut(transitive) To cut off.offend(transitive) To hurt the feelings of; to displease; to make angry; to insult.offersplural of offeroffgasAlternative form of off-gas.office(religion) A ceremonial duty or service, particularly:offing(figuratively) The foreseeable future. Chiefly in the phrase in the offing.offish(informal) Aloof, standoffish.offkeyin an off-key mannerofflay(transitive, rare) To offset.offletA pipe to drain or let off water.offput(archaic) A postponement; the act of putting something off for later.offresplural of offreoffsetAnything that acts as counterbalance; a compensating equivalent.offski(colloquial, Scotland, Northern England) away, not here, offoftens(UK, regional, archaic) Synonym of often.oftest(chiefly poetic, dialect) Most often (superlative form of oft: most oft)ogaire(historical) A young Celtic lord.ogamicAlternative form of oghamic.ogbono(Africa) The almond-like seeds of Irvingia gabonensis, used to thicken soup etc.ogdoadA thing made up of eight parts.ogdoasAlternative form of ogdoad (“a thing made up of eight parts”).oghamsplural of oghamogivalHaving the curved, pointed shape of an ogive.ogived(architecture) Having an ogive.oglersplural of ogleroglingAction of the verb to ogle.ogonek(orthography) A hook-shaped diacritical mark ⟨◌̨⟩ attached underneath a vowel, typically to indicate nasalization, as in Ąą, Ęę, Įį, Ǫǫ or Ųų.ogrishAlternative spelling of ogreish.ohmageAn amount of electrical resistance measured in ohms.oibaraSeppuku of a retainer at the time of his master's death.oidialRelating to, or infected with oidiumoidiumA fragile spore produced by some fungi.oikish(informal) Like an oik; yobbish.oikistAlternative form of oecist.oilboxA container or reservoir for lubricating oil.oilcanA container with a long spout, for holding oil and delivering it in drops or small quantities for lubrication.oilcupA device that dispenses oil for lubrication in an engine, etc., without the need for a human operator.oilersplural of oileroilery(uncountable) The business of producing oil from plants or animals.oilgae(informal) oil-based algal biofueloiliercomparative form of oily: more oilyoiliesplural of oilyoililyFlatteringly, obsequiously.oilingAn application of oil.oilishCharacteristic of or resembling oil.oillet(medieval architecture) A round hole or circle with which an opening for an arrowslit terminates.oilmanSomebody involved in the production, refinement or delivery of oil; such as an oil field worker or executive, or the owner of an oil well.oilmenplural of oilmanoilnutAny nut from which oil may be commercially extracted.oilpanAlternative form of oil pan.oilrigAlternative spelling of oil rig.oilwayAn aperture or conduit for oil.oinkerSomeone or something that oinks.ointedsimple past and past participle of ointoisterObsolete spelling of oyster.oitava(historical) A traditional Portuguese unit of dry measure, equivalent to 1.6–2.4 liters in different 19th-century contexts.okanjeAlternative form of okanye.okanye(phonology) Absence of the form of vowel reduction called akanye.okapisplural of okapiokayedsimple past and past participle of okayokayercomparative form of okay: more okayokayly(rare, nonstandard, proscribed) In an okay manner.okkardPronunciation spelling of awkward.okkerdPronunciation spelling of awkward.okoumeAucoumea klaineana, an African hardwood.oldass(US, vulgar) Used in the same context as old, but more intense.oldbie(Internet, rare) An old-timer, a person with experience.oldestsuperlative form of old: most oldoldfag(Internet slang, derogatory) An oldbie; a veteran member of an online community, especially 4chan and 2b2t.oldiesplural of oldieoldifyTo cause to appear older.oldman(now nonstandard) Alternative form of old man.oldmenplural of oldmanoleate(organic chemistry) Any salt or ester of oleic acid.olefin(organic chemistry) Any of a class of unsaturated open-chain hydrocarbons such as ethylene; an alkene with only one carbon-carbon double bond.oleineAlternative form of olein.olenid(zoology) Any member of the family Olenidae of trilobites.oleone(organic chemistry) An oily liquid obtained by distillation of calcium oleate, and probably consisting of the ketone of oleic acid.oleousAlternative form of oleose.oleoyl(organic chemistry, especially in combination) The univalent carbonyl radical derived from oleic acidolfact(transitive, rare) To smell.olgite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing barium, oxygen, phosphorus, sodium, and strontium.olingoA small procyonid of most species of the genus Bassaricyon, resembling the kinkajou, native to the rainforests of Central and South America.olived(poetic) Decorated or furnished with olive trees.oliver(archaic, rare) A small tilt hammer, worked by the foot.olivesplural of oliveolivet(historical) An imitation pearl manufactured for trade with native peoples.oliveyResembling olives, olive-like.olivid(zoology) Any sea snail in the family Olividae.olivil(organic chemistry) A white crystalline substance, obtained from an exudation from the olive, and having a bittersweet taste and acid properties.olivin(organic chemistry) A complex bitter gum found on the leaves of the olive tree.ollamh(historical) In Irish history, a man of science or learning, equivalent to a university professor.ollaveAlternative spelling of ollamh.olliesplural of ollieollock(historical) An Indian measure of capacity of about 200 millilitres.olomaoMyadestes lanaiensis, a small, dark solitaire endemic to parts of the Hawaiian Islands.olonka(Ghana) A container, a kind of large metal tin for measuring grains and other items.olyrid(zoology) Any catfish in the family Olyridae, which may be a synonym for the Bagridae.omasalRelating to the omasum.omasum(biology, food) The third compartment of the stomach of a ruminant; the lining of said compartment, regarded as a foodstuff.ombudsombudsman (as an abbreviated or gender-neutral title, or in apposition, as in "ombuds office").omegasplural of omegaomeletUS standard spelling of omelette.omenedActing as, or containing, an omen or omens.omenic(rare) Having the quality of an omen; carrying ominous or prophetic significance.omentaplural of omentumomertaAlternative form of omertà.ometer(humorous) A measuring instrument.omigodEye dialect spelling of oh my God.omnify(transitive) To render universal; to enlarge.omnismThe recognition and respect of all religions.omnistAn advocate of omnism.omnium(finance) The aggregate value of the different stocks in which a loan to government is usually funded.omugwoIn Igbo culture, postpartum care provided to a new mother by the newborn's maternal grandmother or mother-in-law or a female relative.omutsu(Japanese pornography, ABDL, rare) A diaper.omwesoA traditional mancala game of Uganda.onagerThe Asiatic wild ass or hemione (Equus hemionus), an animal of the horse family native to Asia; specifically, the Persian onager, Persian wild ass, or Persian zebra (Equus hemionus onager).onagga(obsolete) The dauw.onbeam(neurophysiology) In line with excited parallel neurofibers.onbeat(music) The first and third beats in a bar of four-four time.onbeiaAn elephant's tusk trumpet.oncamesimple past of oncomeonchomAlternative form of oncom.oncoidA layered structure formed by cyanobacterial growth and making up part of an oncolite.oncome(intransitive, rare) To arrive; come to; come on.oncostAdditional costs; extra expenses.ondineAlternative form of undine (“water-sprite”).ondingBreathing; smelling.ondist(music) A person who played a ondes martenotoneish(colloquial) Any time close to one o'clock.onelieObsolete spelling of only.onesieAny of various one-piece attires:onewayAlternative form of one-way.onfallA falling on or upon; an attack, onset, or assault.onflowA flowing onward.ongang(UK dialectal, obsolete) A start-up; beginning; commencement (of activity, work, machinery, etc.); a setting in motion.ongletA hanger steak.ongoerOne who continues moving along a path or carrying on a tradition.onhand(nonstandard) Alternative form of on hand.onhold(transitive) To hold on (to).onionsplural of oniononionyResembling an onion or onions, especially in terms of smell.oniricAlternative form of oneiric.onlandOn the land, as opposed to the ocean.onlead(transitive, archaic) To lead on or forward.onlendTo loan out something that has been borrowed.onlest(US, dialectal, especially African-American Vernacular, possibly dated) Only.onlineOf a system: connected (generally electrically) to a larger network.onload(transitive) To load onto or upon.onloanA loan that is made from something that was borrowed; something that is onloaned.onlookThe act of looking on (something); observation.onlyer(informal, usually in combination) Someone who only adheres to the particular thing mentioned, excluding any alternatives.ononin(biochemistry) An isoflavone, the 7-O-glucoside of formononetin, found in various plants and herbs, including the soybean.onpass(transitive) To pass along or hand over.onrampAlternative form of on-ramp.onroadAlternative form of on-road.onrushA forceful rush or flow forward.onsell(British, business, transitive) To sell (a purchased item) to a second buyer.onsend(transitive) To send; send on; send out; forward; transmit.onsetsplural of onsetonside(sports) Not in an offside position; In the part of the playing area where one can legally play the ball, puck, etc.onslip(British) Alternative form of on-slip.ontake(transitive) To take on; undertake; assume.onusesplural of onusonward(not comparable) Moving forward.onwentsimple past of ongoonwing(aviation) On the wing(s) of an aircraft.onycha(obsolete) the operculum of kinds of strombus or muricid, smoked as an ingredient in the Mosaic incense and pre-modern medicineoocyan(archaic) biliverdinoocyst(mycology, archaic) A reproductive cell in certain fungi.oocyte(cytology) A cell that develops into an egg or ovum; a female gametocyte.oodles(originally US, informal, chiefly with "of") unspecified large amount, number, or quantity; lots, tons.oogamy(biology) A form of anisogamy (heterogamy) in which the female gamete (e.g. ovum) is significantly larger than the male gamete (sperm) and is non-motile.oogramAn image, typically of parasite eggs, produced by oographyoogrukSynonym of bearded seal.oohingpresent participle and gerund of oohookpik(Canada) A handicraft stuffed toy owl, often made from wolf fur, sealskin, or similar materials.ookrooObsolete spelling of okra.oolite(geology) A rock consisting of spherical grains within a mineral cortex accreted around a nucleus, often of quartz grains.oolith(geology) A spherical granule of which oolite is composed, formed by concentric accretion of thin layers of a mineral (usually calcium carbonate (limestone) but also others such as dolomite and silica) around a core; an ooid.oology(ornithology) The study of birds' eggs.oolongA partially fermented tea, often roasted, which combines the characteristics of green tea and black tea.oomfieAlternative letter-case form of OOMFie.oomiacAlternative spelling of umiak.oomiakAlternative spelling of umiak.oompah(transitive) To produce an oom-pah sound.oomphy(informal) Full of oomph (strength, power, passion or effectiveness).oomska(slang) Filth, dirt.oopart(among conspiracy theorists) An object found in a very unusual or apparently impossible archaeological context (like the Coso sparkplug found in an allegedly 500,000-year-old geode) which would challenge conventional historiography and chronology if authentic.ooplahAlternative form of oopla.oopsieAlternative spelling of oopsy.ooraliAlternative form of wourali.oorialAlternative form of urial.oosome(biology) A mass of protoplasm at one end of an insect eggootype(zoology) The part of the oviduct of certain trematodes in which the ova are completed by being furnished with yolk, and, by secretion from the Mehlis glands, with a shell.oozageSeepage or leakage via oozing.ooziercomparative form of oozy: more oozyoozilyIn an oozy manner.oozingpresent participle and gerund of oozeoozoidMisspelling of oozooid.opaled(poetic) opalescent; misty or milky in appearanceopalicHaving a structure similar to that of opalopampsplural of opampopanakA kind of traditional leather shoe worn in Bulgaria, Bosnia and Herzegovina, Croatia, Macedonia and Serbia.opankaA kind of sandal worn in Eastern Europe.opaqueNeither reflecting nor emitting light.opcode(computing) A mnemonic used to refer to a microprocessor instruction in assembly language.opeletA bright-coloured European actinian (Anemonia sulcata), or the similar Anemonia viridisopenedsimple past and past participle of openopenerA person who opens something.openlyIn an open manner; visibly.operad(mathematics) A set of operations, each one having a fixed finite number of arguments and one output, which can be composed with others.operasplural of operaoperonA unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and structural genes that are transcribed together.opeway(England, dialectal) A passageway.opgaaf(South Africa, historical) A tax on produce, stock, and capitation.ophite(geology) Any of various rocks having snake-like markings, such as a mottled greenish porphyry.ophrysAny orchid of the genus Ophrys, often vernacularly called bee orchids.opiate(pharmacology) Relating to, resembling, or containing opium.opiineA braconid wasp of the subfamily OpiinaeopilioThe snow crab Chionoecetes opilio.opinedsimple past and past participle of opineopinerOne who opines.opinesthird-person singular simple present indicative of opineopioidA substance that has effects similar to opium:opless(Internet, IRC) Without ops (channel operators).oplock(computing) An opportunistic lock on a file system object, used for caching purposes rather than to avoid modifications by multiple users at once.oppariAn impromptu folk song of southern India, traditionally sung by women during a death ceremony in order to memorialize the person who has died.oppingpresent participle and gerund of opoppone(obsolete) To oppose.opposeTo attempt to stop the progression of; to resist or antagonize by physical means, or by arguments, etc.; to contend against.oppugn(transitive, rare) To contradict or controvert; to oppose; to challenge or question the truth or validity of a given statement.opsony(obsolete) Any food that is eaten with bread.opster(colloquial) An artist who creates op art.optantA person who opts into, out of, or for something.optate(rare before the 19th century, now literary) To choose, settle on, opt.optickObsolete form of optic.optics(physics) The physics of light and vision: basic optical science.optime(Cambridge University) A student who graduates with second class ("senior optime") or third class ("junior optime") honours in mathematics, or (loosely) in any other subject.optingpresent participle and gerund of optoptionOne of a set of choices that can be made.optode(chemistry) An optical sensor device that optically measures a specific substance.opusesplural of opusoracheAlternative spelling of orach.oracleA shrine dedicated to some prophetic deity.orandaA goldfish characterized by a prominent raspberry-like hood encasing its head.orange(countable) An evergreen tree of the genus Citrus such as Citrus sinensis which yields oranges (the fruit).orangsplural of orangorangyAlternative spelling of orangey.oranteAlternative form of orans.oratedsimple past and past participle of orateoratesthird-person singular simple present indicative of orateoratorSomeone who orates or delivers an oration.orbate(obsolete) Bereft (of anything); especially: fatherless or childless.orbita(anatomy) Obsolete form of orbit.orbitsplural of orbitorbity(obsolete) A bereavement by loss of parents or children; the state of being orbate; orbation.orbwebThe web of an orbweaver spiderorcein(chemistry) a dye, related to litmus, that is extracted from the lichen Rocella tinctoria; used as a microscopic stain and as a food colouringorcess(fantasy, mythology) A female orc.orchalObsolete form of orchil.orchatObsolete form of orchard.orchelAlternative spelling of orchil.orchet(UK, dialect, archaic) orchardorchidA plant of the orchid family (Orchidaceae), bearing unusually-shaped flowers of beautiful colours.orchie(surgery, transgender slang) Clipping of orchiectomy.orchilAny of several lichens, especially those of the genera Roccella and Lecanora.orchisAn orchid; now specifically, a plant of the genus Orchis.orcine(organic chemistry) Dated form of orcin.orcish(fantasy) Of or relating to orcs (monstrous humanoid creatures).ordainTo prearrange unalterably.ordeal(figuratively) A painful or trying experience.ordersplural of orderordureDung, excrement.oreadsplural of oreadoreideAlternative form of oroide.oremus(Roman Catholicism) A liturgical prayer.orendaA mystical power thought by the Iroquois to pervade all things.orexin(biochemistry) Either of two neuropeptide hormones found in vertebrates; the hypocretins.orexis(psychology) The affective and conative character of mental activity as contrasted with its cognitive aspect; the appetitive aspect of an act; desire, appetite.orfrayAlternative spelling of orphrey.orfreyAlternative spelling of orphrey.organaplural of organumorgansplural of organorganyObsolete form of oregano (“wild marjoram, Origanum vulgare”)orgasmA creamy white alcoholic cocktail containing amaretto, Irish cream, and coffee liqueur.orgeatA sweet syrup made from sugar and almonds (or originally barley) and rose water or orange-flower water.orgiesplural of orgyorgoneIn the psychoanalytic theory of Wilhelm Reich, a form of sexual energy or life force distributed throughout the universe and available for collection, storage, and further use.orguesplural of orgueoribisplural of oribiorichaAlternative spelling of orisha.orielsplural of orielorientThe part of the horizon where the sun first appears in the morning; the east.origanAlternative form of oregano (“wild marjoram, Origanum vulgare”).originThe beginning of something.orihonA book in the form of a long strip of paper with writing on one side, folded in zigzag fashion, historically associated with Japan and China.orioleAny of various colourful passerine birds, New World orioles of the genus Icterus (family Icteridae) and Old World orioles of the family Oriolidae.orishaA divine entity in Yoruba religion that possesses the supernatural capability of reflecting some of the manifestations of OlódùmarèorizonObsolete spelling of orison.orkish(fantasy) Of, pertaining to, or sharing similarities with an orc.orling(Northern England) A stunted child.ormersplural of ormerormoluGolden or gilded brass or bronze used for decorative purposes.ornaryAlternative spelling of ornery.ornateElaborately ornamented, often to excess.ornery(originally and chiefly US, especially Appalachia, informal) Disagreeable, stubborn, and troublesome to deal with; cantankerous.orobol(organic chemistry) An isoflavone, found in Aspergillus niger and Streptomyces neyagawaensis, that is a potent inhibitor of phosphoinositide 3-kinase.orogen(geology) Rock deformed by orogeny; a belt of such rock(s).oroide(dated) An alloy of copper and zinc or tin that has a gold color, used in making inexpensive jewelry.oronymThe toponym of a mountain.oroticOf or pertaining to orotic acid or its derivativesorpeko(East Africa) A form of spirit possession or spiritual sickness among Maasai people, especially women.orphanA person, especially a minor, both or (rarely) one of whose parents have died.orphon(genetics) A gene located outside the main chromosomal locus.orpineA yellow pigment of various degrees of intensity, sometimes approaching red.orrachArchaic form of orach.orreryA clockwork model of any given solar system.orriceObsolete form of orris (the plant or its root).orthelA kind of soil that shows little or no cryoturbation.orthicorthoclasticorthid(zoology) A brachiopod shell of the genus †Orthis (or allied genera) in the family †Orthidae.orthosplural of orthoortingpresent participle and gerund of ortortive(archaic) Of or relating to the time or act of rising; eastern.orxataAlternative form of horchata.oryallObsolete form of oriel.oryxesplural of oryxoryzin(biochemistry) A predominant extracellular alkaline endopeptidase of the mold Aspergillus oryzae.osajinA flavonoid pigment found in the horseapple.oscarsplural of oscaroscineOf or pertaining to songbirds (suborder Passeri).osculaplural of osculumosculeObsolete form of osculum.oscuroA cigar made with very dark tobacco.osetraCaviar made from the Russian sturgeon.oshakuAn apprentice geisha having the role of pouring sake or other alcoholic beverages for others.oshana(Namibia) A kind of seasonally inundated depression, particularly in Namibia's Oshana Region.osiery(historical) A willow plantation.osmate(inorganic chemistry) Any salt of osmic acid.osmian(mineralogy) Containing osmium.osmicsThe scientific study of smells.osmide(inorganic chemistry) Any binary compound of osmium and a more electropositive metalosminaAn old Russian dry measure, approximately 105 litres; half of a tchetvert.osmite(chemistry) A salt of osmious acid.osmium(countable) A single atom of this element.osmole(chemistry) A unit of measurement, a mole of an osmotically active compoundosmose(intransitive) To diffuse by osmosis.osmousAlternative form of osmious.osmundAlternative form of osmunda (“type of fern”).osophyA belief or doctrine, ismosprayObsolete spelling of osprey.ospreyAigrette (ornamental feather).ossean(obsolete) A fish with a bony skeleton.ossein(biochemistry) The collagen component of boneosseusMisspelling of osseous.ossify(ambitransitive, animate) To become (or cause to become) inflexible and rigid in habits or opinions.osteinAlternative form of ossein.ostendTo exhibit or showostent(ambitransitive, obsolete) To make an ambitious display of; to exhibit or show boastingly; to ostentate.osteon(anatomy) Any of the central canals, and surrounding bony layers, found in compact bone.ostholAn O-methylated coumarin and calcium channel blocker found in plants such as Cnidium monnieri, Angelica archangelica, and Angelica pubescens.osthya(India linguistics) a labial consonantostial(anatomy) Relating to any orifice, or ostium.ostiumA small opening or orifice, as in a body organ or passage.ostlerA person employed at an inn, hostelry, or stable to look after horses; a groom.ostomy(surgery) A surgical procedure to provide an exit point for the waste of an organism.otalgyArchaic form of otalgia.otamanAlternative form of ataman.otengaA flowering evergreen tree of southeastern Asia, Dillenia indica, bearing edible fruits.othereObsolete spelling of other.othersplural of otherotiant(rare) At ease, at leisure; idling, indolent.otidid(ornithology) Any species of the bustard family Otididae.otinid(zoology) Any gastropod in the family Otinidae.otioseHaving no effect.otitic(medicine) Relating to otitis, or inflammation of the ear.otitid(zoology) Any species of the family Otitidae (now Ulidiidae) of picture-winged flies.otitis(pathology) Inflammation of the ear.otkhod(historical) The exodus of Russian men from rural to industrial areas to find work outside the agricultural season.otmealObsolete form of oatmeal.otolin(biochemistry) A protein found in the inner ear of vertebrates.otonal(music) Exhibiting or relating to an otonality.ottava(music) One octave higher; as a marking, typically abbreviated 8va.ottersplural of otterotteryOf, pertaining to, or characteristic of an otter.ottomyVery thin person.ouangaA voodoo talisman that houses a spirit.ouboet(South Africa, endearing) An older brother or a male friend.ouchesplural of oucheouchie(colloquial, Canada, US, childish) Synonym of owie (“a painful but minor injury”).oudistSomeone who plays the oud.oudler(card games) In French tarot card games, any of the three most valuable trump cards.oughta(colloquial or dialectal) Contraction of ought to.oughtsplural of oughtougiyaAlternative form of ouguiya.ouklip(South Africa) hardpan (soil layer mostly impervious to water)ouloidArchaic form of uloid.oulongArchaic form of oolong.ouncesplural of ounceouncil(Ireland, obsolete) Scales for weighing produce at a marketouphen(obsolete) elfish or devilishoupireA vampire, an evil spirit.ourang(obsolete) An orangutan.oustedsimple past and past participle of oustouster(property law) Action by a cotenant that prevents another cotenant from enjoying the use of jointly owned property.outact(transitive) To act (play a role) better than.outageA temporary suspension of operation, especially of electrical power supply.outard(obsolete) The Canada goose.outarmTo possess or acquire more powerful weapons than one's opponentoutask(transitive) To ask or proclaim for the last time.outbar(obsolete) To bar out (shut out).outbegTo surpass in begging.outbet(transitive) To bet more than.outbid(transitive) To bid more than (somebody else) in an auction.outbow(transitive) To surpass in bowing.outboxA box holding papers to be transmitted to others, usually by mail.outbud(poetic, ambitransitive) To sprout.outbuy(transitive) To spend more money than (someone) buying goods.outbye(mining) In the direction away from the coal face.outcap(nonce word) To cap ("lie") more than.outcar(metaphysics, philosophy, linguistics) A car completely outside of any garage, or the portion of a car that is not inside a garage.outcon(transitive) To outdo in confidence trickery.outcry(countable, uncountable) A loud cry or uproar.outcue(radio, television) A cue indicating that a portion of broadcast material will shortly end.outcut(transitive) To cut out.outdidsimple past of outdooutdinTo din more loudly than, make a louder noise than (someone or something).outeat(transitive) To eat more than.outersplural of outeroutfib(transitive, informal) To surpass in fibbing; to outlie.outfitA set of clothing (with accessories).outfly(transitive) To fly better, faster, or further than.outfox(transitive) To beat (someone) in a competition of wits with superior cleverness or cunning; to outsmart.outgas(materials science) Gaseous substances released into the air, especially from a polymer material as it is aged or heated.outgay(informal, transitive) To surpass in being homosexual or in behaving in a stereotypically gay manner.outgun(transitive) To defeat in terms of firepower.outhitTo hit something better or further than (another), especially to score better in a game involving hitting a ball with a bat.outhop(transitive) To hop better than; particularly higher than, further than, or faster than.outhutAn outbuilding in the form of a hut.outingA pleasure trip or excursion.outjet(archaic) That which sticks out or projects; a protrusion or projection.outjie(South Africa) A boy; a guy.outjig(transitive) To outdance.outjogIn card tricks, one or more cards secretly made to protrude slightly from the deck and away from the performer.outjut(intransitive) To jut outward.outken(transitive, nonce word) To surpass or exceed in knowledge.outlawA fugitive from the law.outlayA laying out or expending; that which is laid out or expended.outler(Scotland, obsolete) unhoused cattle, wintered in the fieldsoutletA vent or similar passage to allow the escape of something.outlie(transitive, rare) To lie outside, or at the extremes or periphery of.outlotA plot of undeveloped land, sometimes without access to public roads, designated by a developer on a plat for future construction or noted for its unsuitability to be designated a full lot.outman(transitive, stative) To have more people than (one's competitor); to outnumber in men.outpad(US) A part of a shopping center located outside the main building, nearer to the street, amid the parking lot.outpay(transitive) To pay more than (someone).outputThat which is produced by something, especially that which is produced within a particular time period or from a particular effort.outransimple past of outrunoutrap(transitive) To surpass in rapping (speaking lyrics in rap music); to rap better than.outray(obsolete) To spread out in array.outrow(transitive) To row faster or better than.outrun(transitive) To run faster than.outsawsimple past of outseeoutsee(transitive) To see beyondoutseg(transitive, informal, US, politics) To outsegregate.outsetAn onset; the beginning or initial stage of something.outsew(transitive) To surpass in sewing; to sew more or better than.outsin(transitive) To surpass in sinning.outsitTo remain sitting, waiting, or in session, longer than, or beyond the time of; to outstay.outski(transitive) To ski better than; to surpass in skiing.outspy(transitive) To surpass in spying.outsum(transitive, archaic) To exceed in number or quantity.outtieAlternative form of outie.outtopAlternative form of out-top.outvie(transitive) To outdo a competitor or rival.outwar(transitive) To defeat or surpass (someone) in warfare.outway(Internet) The path outbound from the LAN (Local Area Network) to the WAN (Wide Area Network).outwin(obsolete) To win a way out (of); to escape (from).outwit(transitive) To get the better of; to outsmart, to beat in a competition of wits.outwoo(transitive) To surpass in wooing.ouvert(ballet) A position in which the feet are apart, or a movement which brings them apart.ouzelsplural of ouzelouzeriA Greek taverna serving ouzo and snacks.ovallyIn an oval shape.ovariaplural of ovariumovatedsimple past and past participle of ovateovenedHaving an oven, or a particular type of oven.overby(archaic) A little way over.overdo(transitive) To do too much; to exceed what is proper or true in doing; to carry too far.overedsimple past and past participle of overovergo(intransitive, UK, dialectal) To pass by, pass away; often, to go unnoticed.overly(sometimes proscribed) To an excessive degree.oviferA small wire cage on a solid base, for carrying an egg safely.ovigerA leg, of some pycnogonids, that is modified to carry eggsovisacA Graafian follicle; any sac containing an ovum or ova.ovonicOf or relating to ovonics.ovularOf or pertaining to an ovule.ovulesplural of ovuleovulid(zoology) Any gastropod in the family Ovulidae.ovulin(biochemistry) A seminal protein that mediates ovulation in fishovulum(anatomy, now rare, historical) An ovum.owambeAlternative form of owanbe (“Elaborate or Flamboyant Yoruba party”).owanbeAn elaborate Yoruba party with food and dancing.owarriAlternative form of oware.owchieAlternative form of ouchie.owings(rare) That which is owed; debt.owldomThe realm or sphere of owls.owlery(zoology) An abode of owls.owletsplural of owletowlflyAny insect in the family Ascalaphidae.owlful(literary) Full of owls.owlingBirding, specifically to catch owls.owlishResembling or characteristic of an owl.owlismAffected or pretentious wisdom; pompous dullness; bombast.ownage(baseball) The situation where one player has a history of domination over another player.ownersplural of ownerowningpresent participle and gerund of ownoxacidArchaic form of oxyacid.oxalan(chemistry) A complex nitrogenous substance, C₃N₃H₅O₃, obtained from alloxan (or when urea is fused with ethyl oxamate).oxalicOf or pertaining to oxalic acid or its derivatives.oxalis(horticulture) Any of various ornamental flowering plants of the genus Oxalisoxalyl(organic chemistry, especially in combination) Either the univalent or the divalent radicals derived from oxalic acid by removal of one or two hydrogen atomsoxamic(organic chemistry) Of or pertaining to oxamic acid or its derivativesoxamidArchaic form of oxamide.oxamyl(organic chemistry) The pesticide methyl 2-(dimethylamino)-N-[(methylcarbamoyl)oxy]-2-oxoethanimidothioateoxanol(organic chemistry) The alcohol tetrahydro-2H-pyran-2-ol derived from tetrahydropyranoxbaneA poisonous bulbous plant, Boophone toxicaria.oxbowsplural of oxbowoxcartA cart designed to be drawn by an ox or oxen.oxelipObsolete form of oxlip.oxepin(organic chemistry) The unsaturated seven-membered heterocycle containing six carbon atoms, one oxygen atom and three double bonds; it is tautomeric with the epoxide benzene oxideoxeyedAlternative form of ox-eyed.oxeyesplural of oxeyeoxfordAlternative letter-case form of Oxford (cloth)oxgang(historical) The area of land that could be plowed by an ox in a year, ¹⁄₈ hide or carucate and notionally 15 acres.oxgate(historical) Synonym of oxgang.oxgoadA goad for driving oxen.oxhead(obsolete) A fool; a blockhead.oxherdOne who herds oxen.oxhideThe skin (hide) of an ox.oxhind(obsolete) Synonym of cattleman.oxhornThe horn of an ox.oxicamAny of a class of non-steroidal anti-inflammatory drugs that bind closely to plasma proteins.oxidesplural of oxideoxidic(inorganic chemistry) Relating to an oxide.oximesplural of oximeoxisolA soil type, containing at all depths no more than ten percent weatherable minerals, and low cation exchange capacity. They are always red or yellowish and best known for their occurrence in tropical rainforest.oxlandAn old land measure, equivalent to eight acres.oxless(rare) Having no ox or oxen.oxlikeResembling or characteristic of an ox: strong, foolish, etc.oxlingA small, young, or miniature ox.oxlipsplural of oxlipoxoionSynonym of oxoanion.oxolin(medicine) The antiviral compound 1,2,3,4-tetrahydrotetraoxonaphthaleneoxonolAny of a series of fluorescent dyes that have two or more oxazol ringsoxshoe(historical) A shoe for oxen, consisting of a flat piece of iron that is nailed to the hoof.oxskinThe hide of an ox.oxslipAlternative form of oxlip.oxtailThe tail of an ox or cow.oxtersplural of oxteroxworkThe work of an ox.oxyarc(engineering) An arc produced in an atmosphere of oxygen, used for welding.oxygal(obsolete) Sour milk.oxygen(loose but very common, even in formal use) Molecular oxygen (O₂), a colorless, odorless gas at room temperature.oxygon(geometry, archaic) An acute triangle.oxymel(historical, medicine) A mixture of honey, water, and vinegar, boiled to a syrup, sometimes mixed with herbs or spices.oxyopyArchaic form of oxyopia.oyabunThe absolute leader of a yakuza clan. He has an advisor called a saiko-komon.oyamelAbies religiosa, the sacred fir, an evergreen coniferous tree of South America with needle-like leaves.oynounObsolete form of onion.oysterThe delicate oyster-shaped morsel of dark meat contained in a small cavity of the bone on each side of the lower part of the back of a fowl.oystre(rare) Obsolete form of oyster.ozaenaAn atrophic type of chronic non-specific rhinitis characterized by a foul odor from the nose, now considered rare.ozogen(dated) An aqueous solution of hydrogen peroxide formerly used as a disinfectant.ozonerA drive-in movie theater.ozoneyReminiscent of ozone.ozonicOf or pertaining to ozone.
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