Other Ending Letters

Word Lengths Starting With A

All 1517 Matching Words

aamchoorAlternative form of amchur.aamchurAlternative form of amchur.abacavir(pharmacology) An antiretroviral drug (trademark Ziagen) taken orally in the form of its sulfate (C₁₄H₁₈N₆O)₂·H₂SO₄ in combination with other antiretroviral drugs to treat HIV infections. It is a synthetic nucleoside analog that acts by inhibiting reverse transcriptase. It causes potentially serious hypersensitivity reactions in a small percentage of patients.abacterAlternative spelling of abactor.abactor(law, archaic) One who steals and drives away cattle or beasts by herds or droves; a cattle rustler.abaiserIvory black; animal charcoal.abandonerOne who abandons.abar(transitive, obsolete) To bar, prohibit, or block.abarticular(medicine) Away from the joints; not articular.abaser(rhetoric) One who, or that which, abases.abaterOne who, or that which, abates.abatjourAlternative spelling of abat-jour.abator(law) a person who, without right, enters into a freehold on the death of the last possessor, before the heir or deviseeabattoirA public slaughterhouse for cattle, sheep, etc.abbaserObsolete form of abaser.abbreviaterArchaic spelling of abbreviator.abbreviatorA person who abbreviates or shortens.abdicatorOne who abdicates.abdominiserAlternative form of abdominizer.abdominizerAny type of exercise equipment designed to work the abdominal muscles.abdominojugular(medicine) Concerning the abdomen and the jugular veinabductorOne who abducts; a kidnapper.abear(transitive, now rare, dialectal) To put up with; to endure; to bear.abeerAlternative form of abir.abelisaur(zoology) Any dinosaur of the superfamily Abelisauroidea.aberemurder(historical) premeditated murderaberr(intransitive, obsolete) To go astray; to err.aberrator(optics) A device that simulates aberration in an image.aberrometerA device that measures refractive aberrations of the eyeaberuncatorA pruning device mounted on a pole, so as to reach high branches; a weeding machine.abetterAlternative form of abettorabettorOne that abets an offender; one that incites; instigates; encourages.abhirAlternative form of abir.abhor(transitive) To regard (someone or something) as horrifying or detestable; to feel great repugnance toward.abhorrerOne who abhors.abhourObsolete form of abhor.abiderOne who dwells or stays; a resident.abier(UK, dialect, West Country, Somerset) Dead but unburied.abir(India) An aromatic red powder that is used during the Holi festival.abiturAlternative letter-case form of Abitur.abiurerObsolete form of abjurer.abjurerOne who abjures.abjurorAlternative form of abjurer.abkar(North India) A wine seller; one who is subject to the abkari tax.ablatorA material that ablates, vaporizes, wears away, burns off, erodes, or abrades.ablercomparative form of able: more ableablurBlurry, blurred.ablutionerOne who performs ablutionabnegator(rare) One who abnegates, denies, or rejects.abolisherAgent noun of abolish; one who abolishes.abominatorOne who abominates.abopercular(biology, physiology, medicine, parasitology) On the opposite side from the opercular side.aborterOne who or that which aborts.abounderOften followed by in: one who abounds in something; one who has plenty.abraderSomething that abrades; a tool or machine for abrading.abraserA tool or machine for abrading; abrader.abrasiometerA device which measures the resistance of surfaces to abrasion.abrasorSynonym of abrader.abreuvoirA cold water drinking fountain (for people) typically found in a public location; more generally, any fountain or water source (including for animals like birds, horses etc).abridgerOne who abridges, a person who shortens written works.abrogatorOne who abrogates.absconderA person who absconds.abscotchalater(archaic, thieves' cant) Someone hiding from the police.abseilerSomeone who abseils.absenterOne who stays away; one who absents herself or himself.absolvitor(Scots law) A decision or decree made by a court in favour of the defendant in a given action; dismissal.absolviturMisspelling of absolvitor.absorberSomething that absorbs.absorptiometerAn instrument that computes the absorption rate by measuring the pressure of the gas; a colorimeter for liquids.absquatulatorOne who absquatulatesabstainerOne who abstains; especially, one who abstains from something, such as the use of alcohol or drugs, or one who abstains for religious reasons; one who practices self-denial.absteynerObsolete form of abstainer.abstracterOne who abstracts, or makes an abstract, as in records or documents.abstractorAlternative form of abstracterabstruser(rare) comparative form of abstruse: more abstruseabsurdercomparative form of absurd: more absurdabumbrellar(obsolete) Alternative form of abumbral.abuserOne who abuses someone or something.abutterOne who, or that which, abuts, specifically, the owner of a contiguous estate.abvalvarAway from the valve (of a mollusc)abventricularOriented or positioned away from a ventricle.acanthorThe spindle-shaped embryo stage of Acanthocephala that burrows into the body cavity of its first intermediate host.acapsular(botany) Having no capsule.acarA vegetable pickle of Maritime Southeast Asia, a local version of the Indian achar.acater(obsolete or historical) A caterer.acatourAlternative spelling of acater.accederOne who accedes.acceleratorOne who, or that which, accelerates.accelerometerAn instrument for measuring acceleration.accensor(Roman Catholicism) One of the functionaries who light and trim the tapers.accentorAny bird of the Eurasian genus Prunella, such as the dunnock.accentuatorAn agent that accentuates.accepterA person who accepts; a taker.acceptorOne who accepts.acceptour(rare) Obsolete spelling of acceptor.accessionerOne who accessions.accessorSomeone or something that accesses.accipenserAny sturgeon of the genus Acipenser.accipiter(ornithology) Any hawk of the genus Accipiter.acclaimerOne who acclaims.acclimatiserNon-Oxford British English standard spelling of acclimatizer.acclimatizerAn agent that acclimatizes itself or others.acclimatorOne who or that which acclimates.accommodatorOne who accommodates.accommodometerAn instrument used to measure the accommodation of the eye.accomodatorMisspelling of accommodator.accompanierSomeone or something that accompanies.accomplisherOne who accomplishes.accorder(rare) One who accords.accosterOne who accosts somebody.accoucheur(medicine) A person, especially a man, who delivers a baby (in childbirth).accounterA person providing an account of events.accountholderSomeone who has an account, as with a bank.accouter(transitive) To furnish with dress or equipments, especially those for military serviceaccreter(astronomy) That which accretes, but especially any massive star etc.accretor(astronomy) An astronomical body (such as a star) that accretes surrounding materialaccruer(law) The act of accruing; accretion.accumber(obsolete, transitive) To encumber; to crush; to overwhelm.accumulator(literal) One who, or that which, accumulates.accusator(archaic) A male accuser.accusatour(rare) Obsolete spelling of accusator.accuserOne who accuses; one who brings a charge of crime or fault.accusorAlternative spelling of accuser.accusourObsolete form of accuser.acellularNot composed of cells; not cellularacentriolarLacking a centrioleacerA plant of the genus Acer; a maple.acerebellar(zoology) Lacking a cerebellumacervular(botany) Relating to an acervulusacetabularCup-shaped; saucer-shaped.acetachlorA particular herbicide.acetator(biochemistry, organic chemistry) A device wherein bacteria process a liquid containing alcohol with the help of oxygen into carboxylic acid.acetifierAn apparatus for hastening acetificationacetimeterAn instrument for estimating the amount of acetic acid in vinegaracetobacterAny of the genus Acetobacter of acetic acid bacteria characterized by the ability to convert ethanol to acetic acid in the presence of oxygen, and used in the commercial production of vinegar.acetochlorA chloroacetanilide herbicide that acts by inhibiting elongase.acetometerAlternative form of acetimeter.acetonometerA type of hydrometer used to measure the amount of acetone in an aqueous mixtureacetylator(biochemistry) A human being or other organism that can metabolize certain drugs by acetylating them (to a greater or lesser extent).acetylizerSynonym of acetylator.acetyltransfer(organic chemistry) The transfer of an acetyl groupachaarAlternative spelling of achar.achar(North India) A spicy and salty pickle in Indian cuisine.achatorAlternative form of achatour.achatour(historical) A purveyor of provisions; a provedore. [14th–18th c.]achelor(obsolete) ashlaracher(usually humorous) Something that aches.achiercomparative form of achy /achey: more achy /acheyachieverOne who achieves something.achor(obsolete, pathology) dandruff (or similar condition)acibenzolarA particular fungicide.aciclovir(pharmacology) A cyclic synthetic nucleoside C₈H₁₁N₅O₃ used as an antiviral drug (trademarks Avirax, Zovirax) chiefly in the treatment of chicken pox, shingles, the genital form of herpes simplex, and AIDS.acicularNeedle-shaped; slender like a needle or bristle.acidifier(chemistry) A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.acidimeter(chemistry) An instrument for ascertaining the strength of acids.acidometerA hydrometer, especially one that is used to measure the strength of an acid.acinar(anatomy) Of, pertaining to, or located in an acinus.acinetobacterAny bacterium of the genus Acinetobacter.acinotubular(anatomy) Having both acini and tubulesackerObsolete form of acre.acknowledgerOne who acknowledges.aclatterClattering, making or filled with a clattering sound.acollinearNot collinearacoumeter(physics) An instrument for measuring the acuteness of the sense of hearing.acquiescerOne who acquiesces.acquiescorAlternative form of acquiescer (“one who acquiesces”).acquirerOne who acquires.acquisitorOne who acquires.acquitterOne who acquits or releases.acromioclavicular(anatomy) Pertaining to both the acromion and the clavicle.acromioscapular(anatomy) Relating to the acromion and the scapulaacroter(architecture) An acroterium.acter(in combination) A play or film with a particular number of acts.actifier(chemistry) Synonym of reactivator.actimeter(medicine) A device that measures and records activity and rest.actinometer(physics) An instrument used to measure the heating power of electromagnetic radiation, especially that of solar radiation.actioner(informal) An action movie.activaterAlternative spelling of activator.activatorOne who, or that which, activates.activewearCasual clothing that is comfortable to wear when exercising or partaking in sport; sportswear.actometer(medicine) A device that measures and records activity and rest.actophotometerA device that uses infrared light to monitor the activity of a caged laboratory animalactorSomeone or something that takes part in some action; a doer, an agent.actourObsolete spelling of actor.actualiserAlternative form of actualizer.actualizerOne who or that which actualizes.actuatorSomething that actuates something else.acupuncturatorAn acupuncturist.acutangular(geometry) acute-angled.acutercomparative form of acute: more acuteacyclovir(pharmacology) US and UK spelling of aciclovir.acylsugar(organic chemistry) Any acyl ester of a sugaradaptamer(biochemistry) A type of synthetic oligonucleotide that can bind to a selected target moleculeadaptator(rare) Synonym of adapter.adapterOne who is capable of adapting to differing situations.adaptometerAn optometric instrument that measures the minimum threshold of brightness that can be detected or how well the human eye can adapt to a recently darkened environment.adaptor(Commonwealth) Alternative spelling of adapter.adblocker(Internet) A piece of software that removes advertising elements from a web page.adderA name loosely applied to various snakes more or less resembling a viper.additur(law) The augmentation by a judge of damages awarded by a jury.addresserA person who gives an address or speech.addressorAlternative form of addresser.adducerOne who adduces.adductor(anatomy) A muscle which draws a limb or part of the body toward the middle line of the body, or closes extended parts of the body—opposed to abductor.adefovir(pharmacology) A drug used to treat hepatitis B and herpes simplex virus infection.adelaster(botany) A provisional name for a plant which has not had its flowers botanically examined, and therefore has not been referred to its proper genus.adenocancer(pathology) Synonym of adenocarcinoma.adenoreceptorAn adenosine receptoradenotonsillarRelating to the adenoids and tonsils, especially to adenoiditis and tonsillitisadenovectoradenoviral vectoradhererAn adherent, one who practices or follows a belief.adhesivemeterAn instrument for measuring the adhesive qualities of a substance.adhikarAlternative form of adigar.adigar(India, historical) The head man of a rural village.adikarAlternative form of adigar.adipocellular(anatomy) Composed of both adipose and cellular tissueadipoinsular(biochemistry) Relating to fat and insulinadipometerA calliper used to estimate the amount of internal fat by measuring the thickness of a fold of skinaditherIn a state of confusion, excitement, or anxiety, usually combined with an expectancy.adjiger(India) A snake of species Python molurus.adjudgerOne who adjudges.adjudicatorOne who adjudicates.adjurerOne who adjures.adjurorAlternative spelling of adjurer.adjusterOne who adjusts something, especially the amount of compensation due in an insurance claim.adjustorAlternative form of adjuster.adjutator(archaic) Alternative spelling of agitator.adjutorAn adjutant; a helper or assistant.adlayer(physical chemistry) An adsorbed layer; in surface chemistry, a layer that is chemically interacting with the substrate.admeasurerAgent noun of admeasure; one who admeasures.admierEye dialect spelling of admire.adminicular(obsolete) Supplying help; auxiliary; corroborative; explanatory.administer(transitive) To apportion out, distribute.administererOne who administers something.administrador(historical) A steward or official in various Spanish- and Portuguese-speaking countries.administrator(computing) One who is responsible for software installation, management, information and maintenance of a computer or network.administratourObsolete form of administrator.admirator(archaic) An admirer; one who admires.admirerOne who admires.admittatur(historical) The certificate of admission formerly given in some American colleges, such as Harvard.admitterSomeone who or something which admits.admonisherOne who admonishes.admonitioner(obsolete) An admonisher; one who admonishes.admonitorAn admonisher; a monitor.admor(Judaism) A Hasidic rebbe, the leader of a Hasidic court.adnervularAlong (or alongside) a nervure (vein)adnominalizer(linguistics) A suffix or particle which converts a word to adnominal form.adopterone who adoptsadoptorAlternative form of adopter.adorerSomeone who adores.adornerOne who places adornments; one who adorns.adoxographer(rhetoric) One who composes adoxography.adrenoceptoradrenergic receptoradrenoreceptoradrenergic receptoradsorberSomething which adsorbs, especially a solid material, such as activated carbon, that has a high surface area and is used to capture a gas or liquidadulatorOne who lavishes excessive praises or flattery; one who adulates.adulter(now rare) An adulterer, especially a male one.adulteratorOne who or that which adulterates, or harms the purity of, something.adulterer(loosely) One who commits adultery.adultwearClothing for adults.adumber(rare, archaic, transitive) To overshadow or to obscure.advalvarTowards the valve (of a mollusc)advancerOne who advances or puts forward.advauncerObsolete form of advancer.adventurerOne who enjoys adventures.adverbializer(grammar) A morpheme, particle, etc. that converts a word into an adverb.advertiserOne who advertises.advertizerOne who advertizes.adviserOne who advises.advisorOne who offers advice.advocaterAlternative form of advocator.advocatorOne who advocates; an advocateadvoutrer(obsolete) An adulterer.advowrer(obsolete, Early Modern) A protector, especially a patron saint.advoyerObsolete form of avoyer.adzerA worker who uses an adze.aeger(dated, British school slang) Absent and excused from one’s classes due to illnessaegirAlternative spelling of eagre.aeolsklavier(music, historical) A modification of the aeolodicon, having wooden reeds or springs, and a pedal which triggered a set of bellows (one for each note) and produced a soft and ethereal sound.aequatorObsolete spelling of equator.aeratorA device which mixes air with a substance, particularly soil or a liquid.aerobar(especially in plural) An extension to a handlebar that allows a cyclist to adopt a more aerodynamic position when racingaerobicwearClothing designed to be worn while taking part in aerobics.aerocar(science fiction) A flying car; a flying machine which looks and functions similarly to modern cars, often described as using antigravity technology.aerocellularComposed of air cellsaeroengineerAn engineer in the aircraft industry.aerogenerator(dated) A generator powered by wind, a wind turbine.aerographerSomeone versed in aerography; an aerologist.aeroir(neologism) The taste or flavor of the air associated with a particular place or environment.aeromagnetometerA magnetometer carried on an aircraft in order to measure the Earth's magnetic fieldaeromancerA practitioner of aeromancy.aerometerAn instrument used to measure the mass and density of gases.aeromodelerAlternative form of aeromodeller.aeromodellerA maker of model aircraft.aeromotorA windmill, windpump or similar device powered by the windaeronomerOne who studies aeronomy.aerophotographerOne who carries out aerophotography.aeroplaner(archaic) An aeroplane pilot.aeropylarRelating to an aeropyleaerosoliserA device used for aerosolising.aerosolizerAlternative form of aerosoliser.aerotonometerAn instrument that is used to measure the partial pressure of gases in the bloodaerotrekkerSomeone who practises aerotrekkingaesirThe chief gods of pagan Scandinavia.aesthesiometer(chiefly British) Alternative spelling of esthesiometer.aestivatorAn animal that becomes dormant during the summer or dry season.aethalometerAn instrument that measures the amount of black particulates in air or other gasaetherAlternative spelling of ether.aethyrArchaic spelling of ether.aetosaur(paleontology) Any of an extinct group of heavily armoured herbivorous archosaurian reptiles, of the order †Aetosauria.afarAt, to, or from a great distance; far away.afear(obsolete or dialectal) To imbue with fear; to affright, to terrify.affair(often in the plural) Something which is done or is to be done; business of any kind, commercial, professional, or public.affear(archaic) To frighten, to scare; to terrify.affecterA person who affects to know something or to be something.affectomotorRelating to the effect of emotions on muscle movementaffectorA nerve cell that directly activates a muscleaffectourObsolete spelling of affecter.affeer(transitive, obsolete, law) To assess or reduce an arbitrary penalty or amercement to a precise sum; to fix the market value of.affeerer(law, obsolete) One who affeers.affiancer(archaic) Someone who writers a marriage contract.affimer(biochemistry) A small protein that binds to a target molecule in the manner of an antibodyaffineurOne who ages cheese and purveys it.affinor(mathematics) A type of higher-order tensor used principally by Jan Arnoldus SchoutenaffirmerOne who affirms.affixerA person or thing that affixes.afflicterSomeone who afflicts.afforObsolete spelling of afore.afforderOne who, or that which, affords or makes available.affrayerOne involved in an affray.affreighter(archaic) One who hires or charters a ship to transport goods.affrighter(archaic) One who frightens.affronterSomeone who affronts.affzer(Internet slang) A member of the alt.fan.frank-zappa newsgroup, for fans of the musician Frank Zappa.afibrillarNot having or containing fibrilsaflagellarThat lacks a flagellum.aflower(archaic, poetic) flowering, in bloomafoxolanerA particular isoxazoline ectoparasiticide.afper(Internet slang) A member of the alt.fan.pratchett newsgroup, for fans of the author Terry Pratchett.afterBehind; later in time; following.afterbearA descendant; one who comes after another genealogically.afterburner(aviation) A device in a jet engine which injects fuel into the exhaust system to increase the thrust.aftercareer(dated) The career that follows a particular experience or stage in a person's life; later career.aftercomerOne coming after; a successor; (in the plural) posterity.aftercoolerAn intercooler located at the end of the supercharging chain.afterdinnerFollowing dinner.afterfeather(ornithology) The downy lower barbs of a feather.afternoonerA person performing some activity in the afternoon.aftersummerA short period after summer.afterthinkerOne who acts first and thinks afterwards.afterwarFollowing a war.againsterOne who opposes something.agarA culture medium based on this material.agenderLacking gender (in any sense) entirely.ageplayerOne who takes part in ageplay.agerOne who or that which ages something.aggerA double tide, particularly a high tide in which the water rises to a given level, recedes, and then rises again (or only the second of these high waters), but sometimes equally a low tide in which the water recedes to a given level, rises, and then recedes againagglomeratorA device that agglomerates material.agglutimeterA device used to measure agglutinationagglutinatorThat which agglutinatesaggrandiserAlternative form of aggrandizer.aggrandizerOne who makes great or aggrandizes.aggravatorOne who or that which aggravates.aggregatorSomeone or something which aggregates.aggregometer(medicine) A device used to measure the adhesive aggregation of platelets.aggressorThe person or country that first attacks or makes an aggression; that begins hostility or a quarrel; an assailant.aggrieverOne who aggrieves.aginator(obsolete) A shop owner.aginnerAn oppositional person, especially one opposed to government actions and projects.agistatorRare form of agistor.agisterAlternative form of agistor.agistorOne who agists or takes in cattle to pasture at a certain rate; a pasturer.agitatorOne who agitates; one who stirs up or excites others, for example political reformers.agitatourObsolete form of agitator.agitpropperOne who creates or disseminates agitprop material.aglandularNot glandularaglimmerGlimmering; gleaming or shining.aglomerularLacking glomeruliagomir(biochemistry) Any of a group of small, single-stranded synthetic RNAagonizerOne who agonizes.agranularNot granular; lacking granules.agreerA person who agrees.agricharBiochar produced by a slow pyrolysis process.agricultor(archaic) agriculturist, farmeragricultureragriculturistagridollar(chiefly in the plural) Money earned from agriculture.agrimensor(historical) A land surveyor in Ancient Rome.agrimotor(dated) A tractor (farm vehicle).agripowerThe agricultural capacity of a nation etc. in terms of producing useful crops.agripreneurAn agricultural entrepreneur.agroforesterOne who takes part in agroforestryagropreneurAlternative form of agripreneur.agroprocessorA company that processes agricultural produce.agrostographerOne who studies agrostography.agroterrorSynonym of agroterrorism.aiderA person who aids or assists.aigerAlternative form of eagre; a tidal bore.aigialosaurAny of the family †Aigialosauridae of extinct semi-aquatic varanoid lizards.ailavatorAlternative form of ailevator.ailevator(aviation) Synonym of elevon.aimbotter(video games) Someone cheating in a video game using an aimbot.aimerOne who aims; one who is responsible for aiming.air(uncountable) The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.airbreatherAn airbreathing aircraft engineairbrusherOne who uses an airbrush.aircar(science fiction) A car capable of flight.airconditionerAlternative form of air conditioner.aircoverAlternative form of air cover.airerA framework upon which laundry is aired; a clotheshorse.airfarerOne who travels by air.airframer(aviation) A maker of airframes; aircraft manufacturer.airfreighterSynonym of freighter (“aircraft used to carry freight”).airfryerAlternative spelling of air fryer.airgunnerAlternative form of air gunner.airiercomparative form of airy: more airyairlifterAn aircraft that performs airlifts.airlinerA passenger-carrying aircraft, especially one of a fleet operated by an airline.airmailerAny aircraft used to send airmailairmarkerAlternative form of air marker.airmongerA hopeless visionary, a quixotic or unrealistic schemer.airometerAny of various devices used to measure the amount of air used by a system.airporterA form of transportation that uses shuttlebuses or vans to connect passengers to and from airports and other transportation hubs for a fee.airpowerAirborne military power; an air force.airshowerAlternative form of air shower.airspeedometerSynonym of airspeed indicator.airstairA set of stairs permitting entry to and exit from an aeroplane, typically built into a folding door.airstrikerA vehicle or person that performs an airstrike.airtankerAlternative form of air tanker.airwar(military) A war fought predominantly by aircraft.airworthiercomparative form of airworthy: more airworthyajarSlightly turned or opened.ajitterUnsteady, as from anxiety; jittery.ajr(Islam) hasanatajvarA relish made principally out of red bell peppers, sometimes with eggplant, garlic and chili pepper, predominantly popular in the Western Balkans.akalimeter(obsolete, chemistry) A volumetric device used in akalimetryakerObsolete spelling of acreakether(UK, West Country, Devon, obsolete) quoth he.akiltercrooked, out of alignment, askewalabasterA fine-grained white or lightly-tinted variety of gypsum, used ornamentally.alablasterObsolete form of alabaster.alachlorA particular chloroacetanilide herbicide.alamosaur(paleontology) Any dinosaur in the genus Alamosaurus.alar(anatomy) Of or relating to the armpit; axillary.alarmerOne who alarms; one who sounds the alarm.alastorAn avenging spirit or deity, variously associated with the Erinyes, Nemesis, and more.albedometerAn instrument used to measure the albedo of a surfacealbertosaurAny dinosaur of the genus †AlbertosaurusalbertstalerAlternative form of albertustaler.albertsthalerAlternative form of albertustaler.albertustaler(historical) A coin containing silver, first minted in the Spanish Netherlands at the turn of the 17th century.albertusthalerAlternative form of albertustaler.albumenizerOne who albumenizes.albuminimeterAn instrument, usually made of wood, for determining the quantity of albumen in a liquid, generally urine.albuminizerAlternative form of albumenizer.alcalimeterRare spelling of alkalimeter.alcazarAny Moorish fortress in Spain.alcoholimeterAlternative form of alcoholometer.alcoholmeterAlternative form of alcoholometer.alcoholometerA specialized form of hydrometer used to measure the amount of alcohol in a liquid (such as beer).alcometerA device for measuring alcohol content, used in brewing.alcoometerA hydrometer or aerometer calibrated to measure the percentage of alcohol in a mixture of alcohol and water.alderAny of several trees or shrubs of the genus Alnus, belonging to the birch family.aleconner(historical, UK) One of the officers chosen by the liverymen of London, England for inspecting the measures used in public houses.alectryomancerA practitioner of alectryomancy.alegarvinegar produced from fermented ale.aleglitazar(pharmacology) A drug being developed to treat diabetes.alehousekeeperAlternative form of alehouse keeper.alekeeperAn alehouse-keeper, a person who operates an alehouse; a tavernkeeper, an alekeep.alemonger(historical) A seller of ale.alerterOne who or that which alerts.aleurometerAn instrument used for the examination of crude gluten as to its power of distending under the influence of heat, as a means of judging of the value of a flour for breadmaking.alexanderA cocktail made of cognac or gin, white crème de cacao, and light cream.algesimeterSynonym of algometer.algesiometerSynonym of algometer.algometerAn instrument for measuring pain-inducing stimuli, and the sensitivity to such stimuli.algorCold, chilliness.alicochlear(anatomy) The greater wing of the cochlear bonealienatorA person who alienates.alienerAlternative form of alienor.alienorA person who alienates a property.alignerOne who, or that which, aligns.alinerArchaic form of aligner.alisporivir(pharmacology) A cyclophilin inhibitor.alivincular(biology, of bivalves) Having the longer axis transverse to the hinge linealjofar(India) seed pearlalkabiryellow indirect dye for silks, containing datiscin and extracted from bastard hemp, Datisca cannabinaalkalifeldsparAlternative form of alkali feldspar.alkalimeterA device used to measure alkalinity.alkalinizerA substance that alkalinizesalkalizerAny substance that makes something more alkaline.alkanoferA subsurface reservoir of liquid hydrocarbonsalkavervirAn extract of Veratrum viride alkaloids formerly used as an antihypertensive.alkylator(organic chemistry) An alkylating agent, especially one that alkylates a nucleic acidallayerOne who allays.allegator(obsolete) A person who allegesallegerA person who alleges, especially one who makes a formal allegation.allegoriserAlternative form of allegorizer.allegorizerOne who allegorizes.alleviatorThat who or which alleviates.alliancerOne who favors and/or forms an alliance.alligator(paleontology) A member of the family Alligatoridae, which includes the caimans.alliteratorSomeone who alliterates.allnighterAlternative spelling of all-nighter.alloacceptor(genetics) An allospecific acceptorallobar(physics) Any form of an element having a different isotopic composition to that of the natural element, and thus a different atomic weight.allobarrier(biochemistry, genetics) A biochemical barrier to allograftingallocaretakerAn animal that provides allocare to an infant.allocatorOne who, or that which, allocates.allocatur(law) The allowance of a proceeding, writ, order, etc., by a court, judge, or judicial officer.allocher(linguistics) In a sign language, any of two or more alternative hand signs for a chereme.allodimerAn allomeric dimerallofather(biology) A male alloparentalloisomer(chemistry) Synonym of geometric isomer.allokotosaurAn extinct reptile of the clade †AllokotosauriaallomerAn allomeric compoundallomother(zoology) A human or other creature that provides some maternal care for the young born of another.allosaurAny of several huge carnivorous dinosaurs, of the superfamily Allosauroidea, from the late Jurassic and early Cretaceous periodsallostimulatorAny material that produces allostimulationallotmenteer(UK, informal) a person who grows crops in an allotmentallotrimer(rare) An allomeric trimerallotterOne who allotsalloverAlternative spelling of all-over.allowerOne who allows or permits.allrounderAlternative spelling of all-rounder.alluminor(obsolete) An illuminator of manuscripts and books; a limner.allurerOne who is alluring.allwhitherTo all directions.almacantarArchaic form of almucantar.almander(obsolete) almond treealmanographerOne who compiles an almanac.almemar(Judaism) Synonym of bima.almemorAlternative form of almemar.almightiercomparative form of almighty: more almightyalmnerObsolete spelling of almoner.almogavar(historical) A lightly-clad footsoldier during the Christian reconquest of Islamic Spain.almonerA person who distributes alms, especially the doles and alms of religious houses, almshouses.almsgiverA giver of alms.almucantar(astronomy, archaic or historical) An instrument for observing the heavenly bodies as they cross such a circle.alnager(historical) A sworn officer in England, whose duty was to inspect woollen cloth and fix a seal upon it.alobarWithout a lobe; designating a disorder in which the brain fails to separate into lobes.aloner(nonstandard) More alone or isolated.alpenstockerA mountain-climber, especially one that uses an alpenstock.alphabetiserNon-Oxford British English standard spelling of alphabetizer.alphabetizerOne who, or that which, alphabetizes.alr(Internet slang, text messaging) Clipping of already.altarA table or similar flat-topped structure used for religious rites.altarerA member of a monastic community responsible for providing food and drink; cellarer.altbierA form of German top-fermenting beer that originated in Westphalia and later spread to parts of the Rhineland.alter(ambitransitive) To change the form or structure of.alteratorOne who or that which alters something; a changer.altercatorOne who altercates.altererOne who alters.alternator(electrical engineering) An electric generator which produces alternating current through mechanical means.altimeterAn apparatus for measuring altitude.altincar(obsolete) tincalaltogetherCompletely, wholly, or without exception.alular(ornithology) Pertaining to the alula.alvar(geology) A limestone pavement.alvarezsaurAlternative form of alvarezsaurid.alveolar(anatomy, relational) Relating to the alveoli (small air sacs) of the lungs.amalgamatorOne who amalgamates.amasserOne who amasses.amateur(now rare) A lover of something.amatuerMisspelling of amateur.ambar(rare) Any of various kinds of subterranean or barn-like granary, depending on context, in Iran, Turkey, Russia or the Balkans.ambassadonor(neologism) Someone selected as an ambassador based at least in part upon their history of political donations or contributions.ambassadorAn official messenger and representative.ambassadourObsolete spelling of ambassador.ambeer(chiefly Southern US) The juice from chewing tobacco.amberA yellow-orange colour.ambidexterSomeone who is ambidextrous.ambigenderOf both male and female genders.ambiguatorAnything that creates ambiguity.ambipolarReacting to both positive and negative polarity.ambisinister(rare) Awkward or clumsy with both hands.ambitwistor(mathematics, physics) A form of complex null geodesicamblerA slow-moving, comfortable horse or mule.amboceptor(obsolete) Synonym of hemolysin.ambodexterObsolete spelling of ambidexter.amboreceptorSynonym of hemolysin.ambulancer(military) A medic working in a mobile field hospital.ambulancierambulanceman; paramedicambulatorA walker; one who walks.ambulometerA device used to measure the ambulatory activity of laboratory animalsambuscaderOne who ambushes, or who is involved in an ambush.ambusherOne who ambushes.amchoorAlternative form of amchur.amchurDried and powdered unripe mango, used in Indian preserves etc.amdoxovir(pharmacology) A nucleoside reverse-transcriptase inhibitor (NRTI) undergoing research for the treatment of HIV.ameerAlternative form of emir.amelanchierAny tree or shrub in the genus Amelanchier of the pome fruit subtribe Malinae of the family Rosaceae, with edible, blueberry-like fruit.amelioratorA person who, or thing which, ameliorates.amenderOne who amends.amercerSomeone who amerces.amicrovillarLacking microvilliamildar(historical) A revenue collector having jurisdiction over several villages, in the British Raj.aminodeoxysugar(organic chemistry) Any compound derived from a deoxysugar by replacing a hydroxy group by an amino group.aminoesterAny of a class of local anesthetics.aminosugarAlternative form of amino sugar.aminotransferTransamination.amirAlternative form of emir.amirspasalar(historical) the commander-in-chief of the medieval Georgian army and one of the highest officials of the Kingdom of Georgiaamlakdar(historical) A senior tax collector in what is now Uzbekistan.amlikarAn embroidered Kashmir shawl.ammerThe yellowhammer; yellow bunting; Emberiza citrinella.ammeterA device that measures the magnitude of an electric current, especially one calibrated in amperes.ammonifierThat which ammonifiesamober(historical, law) In Wales, a maiden-fee paid to a lord on the marriage of a maiden in his manor.amobyrAlternative form of amober.amolderAlternative form of amoulder.amor(now nonstandard) Archaic spelling of amour.amortisseurEllipsis of amortisseur winding.amoulder(intransitive) To moulder; to decay.amourCourtship; flirtation.ampelographer(wine) A practitioner of ampelography.amperA tumour, often accompanied by inflammation; pustule; varicose vein; pus; atter.amperemeterSynonym of ammeter.amperimeterSynonym of ammeter.amperometer(rare) Synonym of ammeter.amphiaster(biology) A structure formed in mitosis, consisting of two asters connected by a spindle-shaped bundle of rod-like fibres diverging from each aster.amphimacerA metrical foot consisting of an unaccented or light syllable between two accented or heavy syllables; a cretic.amphiprostylaramphiprostyleamphistylarSynonym of amphistyle.amphitheaterAmerican form of amphitheatre.ampitheaterMisspelling of amphitheater.amplercomparative form of ample: more ampleamplifierAnything that amplifies, or makes something larger or more intense.amplimer(biochemistry) A piece of DNA formed as the products of natural or artificial amplification events, as in a polymerase chain reaction.amprenavir(pharmacology) An antiretroviral drug of the protease inhibitor class that is used to treat HIV infected patients.ampullarResembling an ampulla.amputatorThe person who performs, or thing that causes, an amputation.amurAny of various hybrids of the white amur that were bred for aquatic weed control.amuserSomeone who amuses.amygdalar(neuroanatomy) Of or pertaining to the amygdalaamylobacter(biology) A bacillus (Clostridium butyricum) which develops in vegetable tissue during putrefaction. It has medicinal usesamylometerAn instrument for determining the amount of starch in a substance.anaesthetiserAlternative form of anesthetizer.anaesthetizerAlternative form of anesthetizer.anafunctor(mathematics) A generalized functor that does not employ the axiom of choiceanagrammerA person who makes or finds anagrams.analgesimeterA device used to measure the effectiveness of analgesics in countering painanalgesiometerAlternative form of analgesimeter.analyser(British spelling) Alternative spelling of analyzer.analyzer(US) an instrument for the analysis of somethinganamorphoserAn instrument for anamorphosing an image.anangularContaining no angle.anaphor(linguistics) An expression referring to another expression. In stricter uses, an expression referring to something earlier in the discourse or, even more strictly, only reflexive and reciprocal pronouns.anathematiserAlternative spelling of anathematizer.anathematizerOne who anathematizes; a severe critic.anatomiserAlternative form of anatomizer.anatomizerOne who carries out dissection.ancestorAn earlier type; a progenitor.ancestourObsolete spelling of ancestor.anchisaurAny member of the Anchisauria, a clade of sauropodomorph dinosaurs that lived from the Late Triassic to the Late Cretaceous in North America, Africa, and South America.anchor(nautical) A tool used to moor a vessel to the bottom of a sea or river to resist movement.anchorerOne who or that which anchors.anchourArchaic spelling of anchor.ancientercomparative form of ancient: more ancientandor(India, historical) Synonym of dandy or hammock litter, a strong cloth suspended from a pole or set of poles used as an open sedan chair.anear(obsolete) Nearly.anecdoterA person who tells anecdotes; a raconteur.anemometer(meteorology) An instrument for measuring and recording the speed of the wind, a windmeter.anemorumbometer(meteorology) A type of anemometer which records both wind speed and direction.anesthesimeter(surgery) A device that monitors the amount of anaesthetic given to a patientanesthesiometerAlternative form of anesthesimeter.anesthetizerA device with an anesthetic effectangelmakerAlternative form of angel maker.angelographerOne who writes an angelography.anger(transitive) To cause such a feeling of antagonism in.angererOne who makes someone angry.angiocatheter(surgery) A catheter inserted into a blood vesselangiofollicular(anatomy) Relating to follicles of blood vessels or of the lymph system.angiographerAn expert in angiographyangioinhibitorAny material that promotes angioinhibitionangledozerA kind of bulldozer whose blade can be tilted at an angleanglemeterAn inclinometer (especially in geology, for measuring the dip of strataanglerA person who fishes with a hook and line.anglicizerA supporter of anglicisation.angolarA former currency of Angola between 1926 and 1958, divided into 100 centavos.angor(medicine, dated) Great anxiety accompanied by painful constriction at the upper part of the belly, often with palpitation and oppression.angriercomparative form of angry: more angryangster(informal) An angsty person.angularRelating or pertaining to an angle, or angles.anguloarticular(anatomy) angular and articularangulometerAny of various instruments for measuring exterior angles.anhydrosugar(biochemistry) An intramolecular ether formed by the loss of the elements of water from neighbouring hydroxyl groups of a sugaranhyzer(disc golf) A throw that curves the way as that of the throwing arm, i.e. right for a right-hand player or left for a left-hand player.animadverter(obsolete) Someone who animadverts; a censurer or criticiser.animadvertorOne who animadverts.animalcularOf, relating to, or resembling animalcules.animalierAn artist who depicts animals.animaterAlternative form of animator.animateurOne who promotes particular activity, especially one of a cultural or artistic nature.animator(art) One who creates an animation or cartoon; a cartoonist.anionomerA polymer containing at least one chemical group bearing a negative electrical charge.anjeer(North India) figs (the fruit)anker(obsolete) A measure of wine or spirit equal to 10 gallons; a barrel of this capacity.anklebiterAlternative form of ankle-biter.anklewarmerA small garment, most commonly made from wool, that covers the ankle and parts of the lower leg.anklewear(rare) Clothing worn at the ankles.ankylosaurSynonym of ankylosaurus, Ankylosaurus magniventris, a herbivorous dinosaur of the Cretaceous period notable for its heavy armor and clublike tail.anncrAbbreviation of announcer.annealerA device or process that anneals.annexerOne who annexes.annihilatorOne who annihilates.annotaterMisspelling of annotator.annotatorOne who annotates.announcerOne who makes announcements.annoyerOne who annoys.annularPertaining to, or having the form of, a ring: in the shape of an annulus.annulerOne who, or that which, annuls.annullerAlternative spelling of annuler.annuloventricular(anatomy) annular and ventricularannunciatorAnything that announces something.anodizerOne who or that which anodizes.anointerOne who anoints.anomer(organic chemistry) Any diastereoisomer of a sugar or derivative differing in configuration only at C-1 of an aldose or C-2 of a ketose.anonymiserAlternative spelling of anonymizer.anonymizer(Internet, software) A software tool that attempts to make a user's Internet activity untraceable by acting as a proxy.anotherOne more further, in addition to the quantity by then; a second or additional one, similar in likeness or in effect.anovularSynonym of anovulatory.answerA response or reply; something said or done in reaction to a statement or question.answererA person who, or thing that, answers or responds.antagomirAny of a class of chemically engineered oligonucleotides used to silence endogenous microRNA.antagoniserAlternative form of antagonizer.antagonizerOne who, or that which, antagonizes.antbearAlternative spelling of ant bear.anteaterAny of some other not closely related species that feed with ants, including pangolin (scaly anteater), echidna (spiny anteater), aardvark (African anteater) and numbat (banded anteater).antecessorA person or thing that precedes or goes before.antecessourObsolete form of antecessor.antechamberA small room used as an entryway or reception area to a larger room.antechoirThe part of a church in front of the choir, often reserved for the clergy and choristers.antecursor(obsolete) A forerunner; a precursor.antedaterOne who antedates something.antejentacular(rare, formal) Occurring before breakfast.antennocularRelating to an antenna and eye of an insectantennomerMisspelling of antennomere.antennular(zoology) Of or relating to antennules or an antennule.anteocularPositioned in front of the eyeanteosaurAny extinct therapsid of the clade AnteosauriaanterioinferiorAlternative form of anteroinferior.anterioposteriorAlternative form of anteroposterior.anterior(anatomy) Nearer the forward end, especially in the front of the body; nearer the head or forepart of an animal.anteriourObsolete form of anterior.anteroinferior(anatomy) Located in front and below.anteroposterior(anatomy) Anterior to posterior; front-to-back.anterosuperior(anatomy) From anterior to superior.anther(botany) The pollen-bearing part of the stamen of a flower.anthochlor(organic chemistry) Any of a group of yellow plant pigments that have a chalcone or aurone structureanthologerAn anthologist.anthologiserAlternative spelling of anthologizer.anthologizerAgent noun of anthologize; one who creates an anthology.anthracometer(obsolete, rare) An instrument for measuring the amount of carbonic acid in a mixture, usually in airanthracosaurA member of the extinct genus †Anthracosaurus of embolomeres.anthropogeographerOne who studies anthropogeography.anthropographerOne who studies anthropography.anthropolaterA worshipper of a human or humans.anthropometerA device used in anthropometry to measure parts of the body.antiactivator(biochemistry) That represses an activatorantiagerAn anti-aging cosmetic.antiair(military, aviation) Synonym of antiaircraft.antiaircrafterSynonym of antiaircraftsman.antiamboceptorAny substance that counters an amboceptorantiarA poison obtained from the upas tree.antiarmor(military) Designed for attacking armored vehicles, such as tanks and armored personnel carriers.antiarmour(British) Alternative spelling of antiarmor.antiballooner(textiles) A device that prevents the outward bulging of the material being worked on by a spinning frame.antibearOpposing or countering bears (the animal).antibipolarCounteracting bipolar disorder.antiblisterPreventing or countering blisters.antiblockerA mineral (such as talc) used to prevent blocking during the extrusion of plastic films.antibrucellarThat counters the effects of brucella bacteriaantiburgher(historical, Scotland) A member of a faction of the Scottish Presbyterian Church that refused to take the burgess oath in 1747; since reunited.antiburglarOpposing or countering burglars.antibuserOne who opposes busing (transportation of children to school so as to achieve racial integration).anticaker(rare) An anticaking agent.anticancer(oncology) That is used to treat cancer.anticapsular(of an antibody) That reacts with capsular polysaccharidesanticarOpposed to automobiles or the excessive use of automobilesanticardiovascularThat prevents cardiovascular diseaseanticarrierCountering aircraft carriers.anticensorOpposed to censorshipanticenter(astronomy) The point in the sky opposite to that of the centre of the galaxy (when viewed from Earth)anticerDated form of anti-icer.anticerebellarThat attacks the cerebellumantichamberObsolete form of antechamber.antichatterPreventing chatter noise in a mechanism.antichlor(chemistry) Any substance used to remove excess chlorine or hypochlorite from textiles etc after bleaching; typically sodium thiosulfate.antichoicerAlternative spelling of anti-choicer.antichoirOpposing a choir.anticipatorOne who anticipates.anticircularDescribing movement from the periphery to the centre of a circleanticker(archaic) One who performs antics; a comic performer.anticlutterServing to prevent clutter, especially radar clutter.anticoeurAlternative form of anticor.anticoherer(historical, telegraphy) A device, one form of which consists of a scratched deposit of silver on glass, used in connection with the receiving apparatus for reading wireless signals. The electric waves falling on this device increase its resistance several times.anticolorAlternative spelling of anticolour.anticolour(physics) The property of antiquarks equivalent to that of colour in quarks.anticommutator(mathematics) A function of two elements A and B, defined as AB + BA.anticompetitor(biology) That opposes the activities of a competitoranticomputerOpposing computer technology.anticonsumerOpposing the consumer.anticor(obsolete, equestrianism) A dangerous inflammatory swelling of a horse's breast, just opposite the heart, caused by the friction of a harness.anticounterA device that allows a scintillator to reject false triggers.anticourtierOpposing courtiers.anticreatorOne who opposes a creator.antidebugger(computing) Preventing or inhibiting the use of a debugger.antideer(rare) Opposing deer.antideserterOpposing deserters.antidictatorOpposing political dictatorship.antidoctorOpposing medical doctors.antidollarOpposing the dollar, especially that of the United States.antidrinkerOne who opposes the drinking of alcohol.antiemperor(politics) One who declares himself emperor in opposition to a reigning emperor.antiemployerOpposing employers.antiepicenterAlternative spelling of antiepicentre.antifader(rare) Any substance that counteracts fading.antifarmerOpposing farmers.antifearCountering fear.antiferroquadrupolar(physics) antiferromagnetic and quadrupolarantifertilizerOpposing the use of fertilizer.antifever(pharmacology) Countering fever.antifibrillarThat acts against fibrils or their effectsantifilibuster(US, politics) Opposing or preventing filibuster.antiflickerCountering or preventing flicker.antifoamerAn antifoaming agent.antiforeignerOpposed to foreigners.antifur(furry fandom, Internet slang) Someone opposed to the furry fandom.antigambler(rare) One who opposes gambling.antigangsterOpposing the criminal activities of gangsters.antigenderOpposing gender roles or gender distinctions.antigunnerA proponent of gun control.antihackerOpposing or countering computer hackers.antihamster(immunology, of an antibody) Reacting with the immunoglobins found in hamsters.antihangoverCountering hangovers.antihelicopter(military) Intended for use against helicopters.antihunterOne who opposes the hunting of animals for sport.antihypertensorAnything that counters the effect of a hypertensorantiincinerator(politics) Opposing an incinerator; usually opposing the siting of a particular incinerator in a particular communityantijitterCountering or preventing jitter.antilaborIn opposition to labor unions.antilabourAlternative spelling of antilabor.antilaserProtecting against lasers.antilawyerOpposing lawyers.antileaguer(historical) An opponent of the League of Nations.antileatherOpposed to leather (as involving exploitation of animals).antilifer(derogatory) A person who holds pro-choice beliefs.antilinear(mathematics) Describing a particular mapping of a complex vector space.antiliquorOpposing the drinking of alcoholic liquor.antilitterOpposing or proscribing litteringantiliverPertaining to an autoimmune response affecting the liver.antilunar(astronomy) opposite to the moon (from the Earth)antimacassarA cover for the back or arms of a chair or sofa.antimalodorhaving the property of countering malodor, typically referring to oral malodor ('bad breath').antimarketeerAlternative form of anti-marketeer.antimartyrA martyr for an opposing or heterodox cause.antimasker(healthcare, politics, neologism) A person who is opposed to the practice or mandate of wearing masks.antimasquerOne who takes part in an antimasque.antimatter(physics) Matter that is composed of the antiparticles of those that constitute normal matter.antimerSynonym of enantiomer.antimerger(business) Opposing a corporate merger.antimeterA contrasting rhythm or meter that deliberately interrupts or clashes with the naturally expected metrical pattern.antimicrotubular(pharmacology) antimicrotubuleantimirAny agent that counters microRNA activityantimissionerAn opponent of religious missions.antimodularOpposing or rejecting a modular approach.antimortar(military) Counteracting mortars.antimotherA mother whose behaviour is the opposite of that socially expected of mothers.antimurderOpposing murder.antimutatorA strain of bacteria that has a reduced rate of mutation when compared to the wild strainantineovascularThat counters neovascularizationantinigger(offensive) Opposing black people.antinuclearOpposed to the production or use of nuclear weapons, or opposed to the generation of electricity from nuclear power.antinucleolar(immunology, of an antibody) That reacts with nucleolesantinuker(informal) One who is opposed to nuclear weapons.antipartner(particle physics) The antiparticle of a specific particle.antiperinuclear(immunology, in combination) That is counter to a given perinuclear materialantiperiplanar(physical chemistry) Describing a torsion angle between 150° and 180°antipersisterDescribing an antibiotic that targets organisms that are tolerant to normal antibioticsantiphilosopher(philosophy) A philosopher who practices antiphilosophy.antiphonarAlternative form of antiphonary.antiphonerAn antiphonal.antiplasticizerAny additive used in the process of antiplasticizationantipolarRelating to or located at an antipole.antipolluterAn opponent of pollution.antipoorOpposing or working against the poor.antipopularOpposing the people.antipornographerOne who opposes pornography.antiporter(biochemistry) A cell protein that acts within an antiport to transport different molecules or ions across the membrane in opposite directionsantipowerOpposing political power.antiprayerOpposing prayer.antipredatorAlternative form of anti-predator.antiqueerOpposed to queer (non-heterosexual) people.antiquencherA material (typically a solution) that opposes the quenching of fluorescenceantiquerA person who finishes furniture or objects so they have the appearance of an antique, either for decoration or to perpetrate a fraud.antiradar(military) Preventing detection by radar.antirattlerA device designed to silence the rattling noise of some other component.antireformer(politics) One who opposes reform.antiregular(graph theory) Of a graph: having either zero or two vertices of the same degree.antirenterSomeone who opposes the payment of rent; especially one during the Anti-Rent War in the mid 1800s, who resisted the collection of rents claimed by the patroons from the settlers on certain manorial lands in the State of New York.antirepeaterAny of several electrical or mechanical devices that limit an operation to a single cycle.antirepressor(biochemistry) Any enzyme that blocks or inactivates a repressorantiresorberAny antiresorptive materialantireticularThat counters the functioning of the reticuloendothelial systemantirocker(skateboarding) A wheel configuration where the inside wheels are smaller than the outside ones.antirolloverA technology in a vehicle designed to prevent rollover.antisaloonerOne who opposes saloons (as places where alcohol is sold and drunk).antiscatterThat reduces or eliminates scatterantisecular(sociology, religion) Opposing what is secular.antisettlerOpposing settlers.antishatterPreventing shattering.antishipperAlternative form of anti-shipper.antisilver(finance, historical) Opposing the use of silver as a medium of exchange.antisimilar(genetics) mirror image (attributive)antislaughterOpposing the slaughter of animals.antislaver(sociology) One who opposes slavery.antismearInhibiting the smearing of a substance.antismokerOne who opposes smoking, particularly the smoking of tobacco.antismuggler(law enforcement) Acting to combat or prevent the activities of smugglers.antisniper(military) Countering snipers.antisolar(astronomy) opposite to the sun (from the Earth)antisonar(military) Preventing detection by sonar.antispammer(Internet) An activist who fights spam (unsolicited commercial e-mail).antispatterPreventing spattering.antisplasherA device in a sink or toilet to prevent splashing.antisplinterResistant to splinters.antispreaderAny of several devices that prevent spreadingantisquatterSynonym of antisquatting.antistar(astrophysics) A conjectured type of star formed from antimatter.antistressorAny substance that reduces stress.antistrikerOne who opposes a strike (industrial action).antisugarOpposed to the consumption or production of sugar or sugar-containing foods.antisymmetriserNon-Oxford British English standard spelling of antisymmetrizer.antisymmetrizer(mathematics, physics) A linear operator that makes a wave function of N identical fermions antisymmetric under the exchange of the coordinates of any pair of fermions.antitakeover(business) Countering a corporate takeover.antitamperPreventing tampering.antiterminator(biochemistry) Any enzyme that promotes antiterminationantiterror(law enforcement, military) Opposing or preventing terrorism; antiterrorist.antitheater(dramaturgy) Works of theater that go against theatrical conventionsantithenar(anatomy) Situated opposite to the palm of the hand or the sole of the footantitrailerOpposing or forbidding the use of trailers (unpowered wheeled vehicles).antitransgenderAgainst transgender people.antitremorPreventing or countering tremors.antitrochanter(anatomy) An articular surface on the ilium of birds against which the great trochanter of the femur playsantitruster(US) A government agent who investigates monopolies.antitubercular(pharmacology) That is used to treat tuberculosis.antitumor(oncology) Inhibiting the development of a tumor.antitumourAlternative spelling of antitumor.antiulcer(medicine) Serving to prevent or counteract ulcers.antivaccinatorAlternative form of anti-vaccinator.antivascular(pharmacology, oncology) Describing any drug that attacks the vasculature of a tumourantivaxerAlternative form of anti-vaxxer.antivaxxerAlternative form of anti-vaxxer.antivehicularPreventing the physical progress of vehicles.antivibratorA device attached to a vehicle or machine, etc. to reduce vibrations.antivirAbbreviation of antivirus.antivoucher(education) Opposing a school voucher scheme.antiwarAlternative form of anti-war.antiwarriorOne who has antiwar beliefs.antiwater(particle physics) A hypothetical substance resembling water but made from antimatter.antiwearPreventing mechanical wear.antiworker(politics) Opposing workers.antlerA deciduous branching and bony structure on the head of deer (Cervidae), normally in pairs, grown and shed each year. (Compare with horn, which is generally not shed.)antpeckerAny of the genus Parmoptila of tropical songbirds of Africa.anuclear(cytology) Lacking a nucleusanywhither(rare) To (in the direction of) anywhere.anywitherArchaic form of anywhither.aparThe three-banded armadillo, Tolypeutes matacusapartheider(rare, sociopolitics) A proponent of the apartheid system.apatosaurA large, herbivorous, gregarious sauropod dinosaur, of the genus Apatosaurus, from Jurassic North America; it had a long neck and tail.apehanger(slang, chiefly in the plural) A handlebar on a motorcycle positioned higher than the rider's shoulders.aperSomeone who apes somethingapertometer(optics, microscopy) An instrument designed to measure the numerical aperture of a lens or objective of a microscope.aphanosaurAny reptile of the Aphanosauria clade.aphidozerA device like a hopperdozer for the removal of aphids.aphorismer(rare) A dealer in aphorisms.aphorizerAlternative form of aphoriser.aphrometerA device used to measure the pressure within a bottle of sparkling wine.apicoalveolar(phonetics, of a sound) Articulated with the tip of the tongue against the alveolar ridge.apicopostalveolar(phonetics) Articulated with the tip of the tongue touching the back of the alveolar ridge.apicoposteriorapical and posteriorapicularSituated at, or near, the apex; apical.apicultor(rare) Synonym of beekeeper.apidictor(beekeeping) An instrument which measures and records the sounds in a beehive.apocenter(astronomy) The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse)apocryphiarOne who rewrites history to their own advantage or tells self-aggrandizing falsehoods.apodizer(physics) Any of several devices that permit apodization of an optical or electrical signalapoinducer(biochemistry) A protein that binds to DNA to activate transcription, particularly in positive gene control mechanisms.apolarHaving no polarityapologer(obsolete) A teller of apologues.apologiserNon-Oxford British English standard spelling of apologizer.apologizerAgent noun of apologize: one who apologizes.apolunar(astronomy) Of or relating to the apolune.apomecometerAn instrument for measuring the heights of buildings etc.apopylarRelating to an apopyleaporeceptor(biochemistry) A receptor that targets apoproteins or apolipoproteinsaporepressor(genetics) A repressor that binds with a corepressor.appair(transitive, obsolete) To make worse; to injure or damage.appallerOne who appalls.apparAbbreviation of apparently.apparatorAlternative form of apparitor.apparitorA messenger or officer who serves the process of an ecclesiastical court.appbar(computing, Microsoft Windows) A toolbar, anchored to an edge of the user's desktop, providing quick access to programs or features.appeacher(obsolete) An accuser.appealerSomeone who makes an appeal; an appellant.appear(intransitive) To come or be in sight; to be in view; to become visible.appearer(rare) Someone who or something which appears.appeaserA person who appeases.appeerObsolete spelling of appear.appender(computing) A software component that appends data to a computer file.appendicularOf or pertaining to a limb or appendage.appenzellerA hard, straw-colored cow's-milk cheese with a nutty flavor.appetiserAlternative spelling of appetizer.appetizerA small, light, and usually savory first course in a meal.applanatorA device for measuring intraocular pressure by means of applanation.applauderOne who applauds.applauseometer(informal, US) A device of dubious accuracy used to measure the volume of an audience’s applause.applausometerAlternative spelling of applauseometer.applegrowerA grower of apples.applemonger(historical) A seller of apples.applicatorA tool or device used to apply a fluid or semi-fluid substance to a surface.applierA person or device that applies something.appliquerOne who appliques.applotterOne who applots.appointerA person who appoints (in any sense).appointor(law) appointer, the person who appoints.apporter(obsolete) A bringer in; an importer.apportionerSomeone who apportions; an allocator.apposerAn asker; someone who poses questions.apprAbbreviation of approval.appraiserOne who performs appraisals.appreciaterOne who appreciates.appreciatorSomeone who appreciates a given thing, especially:apprehenderAgent noun of apprehend; one who apprehends.appriser(Scots law) One who carries out an apprising.approacherSomeone or something that approaches.approbator(obsolete) A person who gives formal approval.appropriater(rare) An appropriator.appropriatorA person who appropriates something.approverOne who approves or gives approval.approximatorSomething that approximatesaprAbbreviation of April.aproneer(obsolete, derogatory) A shopkeeper.apsarAn unrecognized currency of Abkhazia.aptamer(biochemistry, genetics) Any subsequence of nucleic acid, selected from a large random sequence-pool, used to bind to a specific target molecule.aptasensorAn aptamer used as a biosensor.aptercomparative form of apt: more aptaquafarmer(agriculture) aquaculturistaquaferAlternative form of aquifer.aqualungerA diver who uses an aqualung.aquaplanerOne who aquaplanes.aquastorA being created and sustained by the power of the imagination and the concentration of thought.aquatinterAn artist who makes aquatints.aquatubularOf a boiler: having water-filled heated tubes.aquiferAn underground layer of water-bearing porous stone, earth, or gravel.aquiverIn a state of excitement, trepidation or agitation; quivering.arThe name of the Latin script letter R/r.arabber(historical, US) A fruit and vegetable hawker with a colorful horse-drawn cart.arachnomancerOne who practices arachnomancy.aratdar(India) A person who owns or runs a warehousearbalesterAlternative form of arbalister.arbalestrierA crossbowman.arbalister(obsolete) A crossbowman.arber(finance, gambling, informal) One who engages in arbitrage; an arbitrageur.arbiterA person appointed, or chosen, by parties to determine a controversy between them; an arbitrator.arbitrager(finance) One who participates in arbitrage.arbitrageur(finance) One who engages in arbitrage, such as a financial broker or an investment bank.arbitratorA person to whom the authority to settle or judge a dispute is delegated.arbitratour(rare) Obsolete form of arbitrator.arblasterAlternative form of arbalister.arborA shady sitting place or pergola usually in a park or garden, surrounded by climbing shrubs, vines or other vegetation.arboratorA person who plants, prunes and takes care of treesarbourUK standard spelling of arbor.arbuscular(botany) Similar to a small tree; shrublike.arcader(informal) One who plays arcade games.archaellarRelating to archaellaarchaeoastronomerAn astronomer whose speciality is archaeoastronomy.archaeographerSynonym of archaeographist.archaeologer(archaic) An archaeologist.archaiserAlternative form of archaizer.archaizerOne who makes archaic, as by using an archaic style.archbutlerA head or chief butlerarchchancellorchief chancellorarchcommander(rare, science fiction, fantasy, video games) The supreme commander; a commander-in-chief.archcompetitorA primary competitor.archconspiratorA chief conspirator.archdeceiver(religion) One who orchestrates deception, especially the Devil.archegosaurAny temnospondyl of the genus †Archegosaurus.archeopylarRelating to the archeopyle.archerOne who shoots an arrow from a bow or a bolt from a crossbow.archetier(lutherie) One who builds, repairs, and restores the bows of instruments in the violin family.archgovernor(rare) A chief governor.archgrandmaster(rare) A chief and great grandmaster.archiater(historical) The chief, or highest-ranked physician of a prince, city or country, such as the Holy Roman Empirearchicerebellar(anatomy) Relating to the archicerebellum.architector(obsolete) An architect.archiverOne who, or that which, archives.archleader(rare) The foremost leader.archlector(historical, Ireland) eminent scholastic, used as a title.archmaster(rare) A chief and superior master.archmurderer(rare) One who kills many people; a murderer who surpasses the profile of a normal serial killer.archosaurA reptile of the taxon Archosauria, which includes modern crocodilians and birds, as well as the extinct pterosaurs, non-avian dinosaurs and other taxa.archpractitioner(rare) A foremost practitioner.archpresbyter(ecclesiastical) Synonym of archpriest.archtraitorA chief or transcendent traitor.archtreasurerA chief treasurer.arcobacterAny of several gram-negative bacteria of the genus Arcobacterarcover(electricity) The unwanted arcing of electricity from one component to another, caused for example by the presence of contaminants.arcubalisterA crossbowman; one who used the arcubalist.arcwelderAlternative form of arc welder.arder(obsolete) plowing or fallowingardorGreat warmth of feeling; fervor; passion.ardourBritish, Canada, and Australia spelling of ardor.arearAlternative spelling of arrear (“backward”).arendator(historical) In the Russian Empire, a person who farmed local rents or revenues.arenosugarMisspelling of arsenosugar.areographerAn astronomer whose speciality is areographyareolar(anatomy) Of or relating to areolae.areometerAny device used to measure the specific gravity of liquids or the density of solids.argentinosaur(paleontology) Any sauropod of the genus Argentinosaurus.argentometerThe measuring instrument used in argentometry.argoletier(obsolete, military) A light mounted soldier; a mounted bowman.arguerOne who argues.argufierOne who argufies.argumentatorOne who argues; a debator.ariolaterone who practices the art of divination and uses interpretation to produce omens.arithmancerSomeone who practices arithmancy.arithmometer(dated) A calculating machine.armator(rare) A shipowner.armbar(combat sports) A joint lock where the elbow is hyperextended in order to cause pain or injury.armbinder(BDSM) A restraint that binds the arms together into a single sleeve.armchairA chair with supports for the arms or elbows.armerOne who arms, or supplies weapons.armigerAn esquire, originally carrying the armour of a knight; (hence, later) a man of the gentry ranking below a knight.armoirDated spelling of armoire.armor(uncountable) A protective layer over a body, vehicle, or other object intended to deflect or diffuse damaging forces.armorbearerOne who carries armor for another.armorerA manufacturer of weapons, especially of guns.armourBritish standard spelling of armor.armourbearerOne who carries armor for another.armourer(British spelling) Alternative spelling of armorer.armsbearerAlternative form of arms-bearer.armsmakerA manufacturer of weapons.armwear(rare) Accessories worn on the arm.armywearClothing to be worn by the army.aroarAbounding with noise; abounding with laughter.aromatizerOne who, or that which, aromatizes or renders aromatic.arouserSomeone or something that arouses.arousometerAn instrument that participants in experiments can use to indicate their changing levels of sexual arousal.arpeggiator(music) A feature of some synthesizers that automatically steps through a sequence of notes based on an input chord, thus creating an arpeggio.arquebusier(military, now historical) A soldier armed with an arquebus.arrAbbreviation of arrival.arraigner(law) One who arraigns.arrangerOne who arranges.arrayerOne who arrays.arrearWork to be done, obligation.arrectorSynonym of erector.arrendatorAlternative spelling of arendator.arrer(nonstandard spelling, representing dialect or uneducated pronunciation) Arrow.arresterOne who places another under arrest.arrestorAlternative form of arrester.arriverOne who arrives; usually, one who arrives in a specified way.arrowmakerA person who makes arrows.arsefucker(UK, Ireland, Commonwealth) Alternative form of assfucker.arselicker(British English) Alternative form of ass-licker.arsenosugar(biochemistry) Any of several carbohydrates that contain arsenic, found in certain marine algae.arteether(organic chemistry, pharmacology) artemotilartemether(organic chemistry, pharmacology) An antimalarial derived from artemisinin, and used to treat multiply drug-resistant strains of falciparum malaria.arteriolar(anatomy) Of or pertaining to an arteriole.arteriolovenularSynonym of arteriolovenous.arteriometerAn instrument used to measure the diameter of arteries as blood flows through themarteriomotorRelating to (or causing) changes in diameter of an arteryarterioventricular(anatomy) Of or relating to the spatial relationship or communication between the great arteries and the ventricles of the heart.arthrometer(medicine) A device for measuring the arc or range of mobility of a joint.articular(anatomy) Of, at, or relating to the joints of the body.articulatorOne who, or that which, articulates or expresses.artiercomparative form of arty: more artyartificerSomeone who is skilled in their trade; an artisan.artlangerOne who creates artlangs.artmakerOne who produces art; an artist.artographerAn artist who uses photography as the basis of his or her work.artolaterA worshipper of bread; one who takes part in artolatry.artpaperHeavy-stock paper that is commonly used in books that show reproductions of artwork.artpreneurAn artist who is an entrepreneur.artrioventricularMisspelling of atrioventricular.artsiercomparative form of artsy: more artsyartwearArtworks designed to be worn as clothing.artworkerOne who creates artwork.arylcopper(organic chemistry) Any aryl organocopper compoundasarAlternative form of osar.ascarAlternative form of ask (“eft, newt”).ascenderA person or thing that ascends.ascendeurA metal grip that attaches to a rope sling and can be tightened to hold a climber or loosened to allow the climber to move.ascertainerOne who, or that which, ascertains.ascolocular(mycology) Describing ascocarps having asci arranged in pre-formed locules, or cavities within a stoma.asherA member of the alt.suicide.holiday newsgroup, which deals with the topics of suicide and depression.ashiercomparative form of ashy: more ashyashimmerShimmering; covered (with something shimmering).ashlar(architecture) Masonry employing flat and well-squared stone or brick, creating an appearance similar to wooden flooring.ashlerAlternative form of ashlar.askar(MLE, slang) Police.askerSomeone who asks a question.aslumber(poetic) Asleep.asmatographer(obsolete) A song or music seller.asmolderAlternative form of asmoulder.aspectualizer(grammar) A constituent of a phrase that specifies the aspect of a verb phrase.aspecular(optics, in surface gloss measurements) Subtended at the origin by the specular axis and the axis of the receiver.asper(phonetics, obsolete) Rough breathing; a mark (#) indicating that part of a word is aspirated, or pronounced with h before it.aspergerAn aspergillum.aspergillarOf or relating to the aspergillus molds.asperserOne who asperses.aspersorAlternative form of asperser.asphalterOne who pours or works with asphalt.asphyxiatorOne who or that which asphyxiates.aspicularLacking spiculesaspiratorA pump which draws gas through a liquid.aspirerOne who aspires to something.aspirometerA device used to diagnose dysphagia by analysis of the sounds produced by swallowingasr(Islam) The afternoon Islamic prayer.assailer(dated) Someone who assailsassamar(organic chemistry, obsolete) melanoidin.assaulterOne who commits assault.assayerOne who assays, or performs chemical tests on metals.assayorAlternative form of assayer.assembler(computer languages, informal, chiefly uncountable) Assembly language.assemblymemberA person who serves as a member of an assembly.assentator(archaic) An obsequious flatterer; a yes man.assenterOne who assents.assentorAlternative form of assenter.asserterAlternative form of assertor.assertorOne who asserts or avers.assessorOne who assesses a property for tax or insurance evaluation.assessourObsolete form of assessor.asseverArchaic form of asseverate.assfuckerSynonym of top: the active partner in anal sex.asshair(countable, uncountable) The hair on an animal's or individual's buttocks.assignerOne who, or that which, assigns.assignor(law) The person or party which makes an assignment.assimilatorA person or thing which assimilates.assisterOne who assists; an assistant or helper.assistorAlternative form of assister.assizerAn officer who has the care or inspection of weights and measures.assizor(obsolete, Scots law) A juror.asskisser(US, vulgar, derogatory) Someone who kisses ass; a sycophantic individual.asslickerAlternative form of ass-licker.asslifter(US, vulgar, religious slur) A Muslim.assmuncher(sometimes vulgar, humorous, slang) Term of abuse.associatorA person who or thing that associates.assorterOne who assorts, or arranges by class or category.assuagerSomeone who or something which assuages.assumerOne who assumes.assur(Jewish law) forbiddenassurerAn insurer; an underwriter.assurorAn assurer; an underwriter; an insurer.astarCovered with bright or sparkling objects.asteer(Scotland) Alternative form of astir.asterAny of several plants of the genus Aster; one of its flowers.astigmometerAn optical device used for measuring the degree of astigmatismastirIn motion; characterized by motion.astonisherSomething that astonishes; an astonishing thing or event.astounderA person who astounds.astragalar(anatomy) Of or pertaining to the astragalus.astragalofibular(anatomy) Relating to, or connecting, the astragalus and the fibula.astringerObsolete form of austringer.astroengineer(science fiction) An engineer who designs or operates spacecraft or space stations.astrogatorOne who navigates through space.astrointerferometer(astronomy) A combination of astronomical telescopes used as an interferometerastrolaterOne who worships the stars.astrologasterA foolish or petty astrologer.astrologerOne who studies or practices astrology.astromancerOne who performs astromancy; a diviner who uses astrology.astrometerAn instrument designed to measure the brightness, relation, or apparent magnitude of stars.astronavigatorOne who performs astronavigation; an astronaut or space pilot.astronomer(astronomy) One who studies astronomy, the stars or the physical universe; a scientist whose area of research is astronomy or astrophysics.astrophotographer(astronomy, photography) A person, especially an astronomer, who takes photographs of the starsastrophotometerA photometer for measuring the brightness of stars.astropreneur(aerospace, business) An entrepreneur in the aerospace sector, especially one from NewSpace ("Space 2.0"). It can also be used for entrepreneurs with innovative ideas for space-derived products for non-space environments ("downstream applications").astutercomparative form of astute: more astuteastylar(architecture) Lacking columns or pilastersasunaprevir(pharmacology) An experimental drug candidate for the treatment of hepatitis C.asunderOf two or more people or things:asur(India, Hinduism) Alternative spelling of Asura.atarAlternative spelling of attar.ataxiameterSynonym of ataxiagraph.atazanavir(pharmacology) An antiretroviral drug of the protease inhibitor class that is administered orally in the form of its sulfate C₃₈H₅₂N₆O₇·H₂SO₄ in conjunction with other antiretroviral agents to treat HIV infected patients.atcharAlternative spelling of achar.atelierA studio or workshop, especially for an artist, designer, or fashion house.atgar(Anglo-Saxon) A kind of spear or lance formerly in use.atgeirA kind of spear-like polearm used by the Norse, conventionally translated as halberd, but of uncertain precise nature.athanor(historical) A furnace or stove designed and used to maintain uniform heat, primarily used by alchemists.atheizer(rare) One who atheizes.athleisurewearCasual sports clothing.athleticwearClothing designed to be worn while taking part in athletics, or to suggest a similar sporty casual style.atmidometerAn instrument for measuring the evaporation from water, ice, or snow.atmolyzer(physical chemistry) An apparatus for performing atmolysis.atmometerAn instrument that measures the rate of evaporation of a liquid.atomiserAlternative form of atomizer.atomizerAn instrument for reducing a liquid to spray or vapor for disinfecting, cooling, medical use or perfume spraying.atonerOne who atones.atotterIn the act of tottering.atrabiliar(archaic) melancholy; atrabiliousatriocentricularMisspelling of atrioventricular.atriofascicular(anatomy) Relating to an atrium and a fascicle.atrioventricular(anatomy, medicine) Of the spatial relationship between the ventricles and the atria of the heart.atropisomer(physical chemistry) Any conformer that can be isolated as a separate chemical compound and that arises from restricted rotation about a single bond, as in biaryl atropisomers. Synonym: atropoisomer.atropodiastereomer(organic chemistry) A diastereomeric atropoisomeratropoisomer(physical chemistry) Any of a group of stable molecules differing only in their conformation: a type of stereoisomer.attacherSomeone who attaches.attackerSomeone who attacks.attainder(law, rare) The state a prisoner entered once a death sentence (usually for treason) had been issued; the state of being stripped of all civil rights.attainerOne who attains.attainor(obsolete) A juror guilty of attaintattarAn essential oil extracted from flowers.attemperTo temper by adjusting relative quantities, or blending qualities.attemperatorA device that regulates the temperature in a fluid system.attempterOne who attempts.attenderAn attendee; one who attends a course, meeting, school, etc.attenuator(physics) Any device that attenuates a signal, but especially an electronic device that reduces the amplitude of a signal.atter(UK dialectal) Epithelium produced on the tongue.attesterOne who attests.attestorOne who attests.attirerOne who attires.attitudiniserAlternative spelling of attitudinizer.attitudinizerOne who attitudinizes, or practises poses.attoliter(US) (metrology) An SI unit of fluid measure equal to 10⁻¹⁸ liters; alternative spelling of attolitre.attometerUS spelling of attometre.attomolar(physical chemistry) Describing a concentration of 10⁻¹⁸ mole per litre. This is only about 600 particles per cubic centimeter.attoreactor(chemistry) An attoscale reactor made by the junction of two nanofibres.attrAbbreviation of attributive.attractorSomething which attracts.attributer(rare) One who attributes; an imputer.attributorOne who attributes; an imputer.attriterOne who, or that which, attrites.attritorA type of grinder in which particles suspended in a liquid are moved by paddles and are ground as they collide with each other or with the grinding medium.attunerOne who attunes.atwitter(postpositive) twitteringatzanavirMisspelling of atazanavir.aucthorObsolete spelling of author.auctioneerAn individual who conducts an auction on behalf of a vendor, accepting bids to find the best price for the vendor.auctionerSynonym of auctioneer.auctiongoerOne who attends an auction.auctorObsolete form of author.auctourObsolete form of author.audaxer(cycling) One who takes part in an audax.audiencierA bailiff in certain French courts.audimeter(television, telecommunications) Electronic device that, installed in a sample of households, automatically records the television channel and consumption of the family or its individual members.audiographerOne who records audio, analogous to a videographer.audiometerAn instrument which is used to determine the acuity of hearing.audiomotorRelated to both the perception of sound and the production of movement.audiovestibular(anatomy) Of or pertaining to the auditory functions of the inner ear and the vestibule of the earauditionerA person who conducts an audition.auditorOne who audits bookkeeping accounts.auditourObsolete form of auditor.augerA carpenter's tool for boring holes longer than those bored by a gimlet.augererOne who uses an auger (boring tool).augmentationer(historical) An officer of the Court of Augmentations.augmenterOne who, or that which, augments or increases something.augmentorAlternative form of augmenter.augur(Ancient Rome) An official who interpreted omens before the start of public events.augurerSynonym of augur.aulnagerAlternative form of alnager.aumildarAlternative form of amildar.auncestorObsolete form of ancestor.auncestourObsolete form of ancestor.aunswerObsolete form of answer.aurarplural of eyrirauricular(relational) Of or pertaining to the ear.auriculocondylar(anatomy) Relating to the ear and the mandibular condyleauriculoventricular(anatomy) Relating to the auricles and the ventricles (of the heart).auscultatorSomeone who performs auscultation.auslander(South Africa) A foreigner.austemper(transitive) To harden (a metal) and produce a stronger microstructure by heating it into the austenite region and then immediately quenching and removing any bainite and ausferrite.austerAlternative letter-case form of Auster (“the south wind”).austerercomparative form of austere: more austereaustringer(falconry) A falconer who uses accipiters for hunting.auteurTo work as an auteur.authenticator(agent noun) One who, or something which, authenticates, as:authorThe originator or creator of a work, especially of a literary composition; or, one of the creators of a collaborative work.authoriserAlternative form of authorizer.authorizerOne who, or that which, authorizes.authourObsolete spelling of author.autigender(neologism) Having a gender identity linked to one's autism.autoactivator(biochemistry, biochemistry) An enzyme involved in autoactivationautoalgometerA device that measures the pressure applied to the skin by a metal tip, used to measure pain resistance.autoanalyser(analytical chemistry, biochemistry) Any of several different devices that partially automate analysis.autoanalyzerAlternative form of autoanalyser.autoanswerA feature of a telephone, modem, etc. that allows an incoming call to be answered automatically.autoanthropometerAn automatic anthropometerautoassociatorSynonym of autoencoder.autobiographerOne who writes his or her own life or biography.autocamperOne who travels (by automobile) to stay at an autocamp.autocar(archaic) A road vehicle powered by steam or electricity rather than by traction.autocellularPertaining to functions or structures within a single cell, as opposed to those which are intercellular.autochanger(computing) An automatic tape loader, for switching automatically between several computer backup tapes.autoclassifier(computing) Something that autoclassifies.autoclicker(computing) A program that simulates the click of a mouse, typically used to automate commands in a graphical user interface.autocoherer(historical, wireless telegraphy) A self-restoring coherer, such as a microphonic detector.autocollimator(physics) A device that uses a plane mirror to align or collimate optical devicesautocorrelator(electronics) A device that modifies a signal with a delayed copy of itself in order to detect any periodic signal hidden in the noiseautocratorArchaic form of autocrat.autocuerA device for the deaf, consisting of a pair of eyeglasses with LEDs attached, used to convert speech into visual patterns for the wearer.autodetectorAn automatic detector.autodialeran electronic device that can automatically dial telephone numbers to communicate between any two points in the telephone, mobile phone and pager networksautodiallerAlternative spelling of autodialer.autodispenserAn automatic dispenserautoencoder(computing) a form of neural network designed to learn codingsautoethnographerOne who carries out autoethnography.autofellatorOne who performs autofellatio.autoglazier(Australia) Someone who repairs or installs windscreens in vehiclesautographerSomeone who writes an autographautographizerA person who collects autographsautographometer(obsolete) An instrument on wheels for recording the topography and height changes of any route over which it is drawn or propelled.autohalerA breath-activated inhaler.autoimmunoanalyzer(immunology) An automatic immunoanalyzerautoimmunostainer(immunology, cytology) An automated immunostainerautoinducer(biochemistry) Any of several compounds, synthesized by bacteria, that have signalling functions in quorum sensingautoinjectorA medical device designed to deliver a single dose of a particular, typically life-saving, drug.autokeratometerAn automatic, hand-held keratometerautokeratorefractometerAn automated keratorefractometerautolaterA worshipper of the self.autoloader(computing) A mechanical device that automatically loads storage media (such as tapes or disks) into the device that can read them.autolocatorA device on a tape recorder used to autolocateautomakerA person or company that manufactures automobiles; usually used to refer to a large corporation such as General Motors, Toyota, and so on.automiserAlternative spelling of automizer.automizerThat which automizes.automoderator(computing) A bot that automatically moderates (a discussion forum, etc.).automotor(obsolete) Any motorized vehicle.automounter(computing) A software system that handles automounting.automower(uncommon) An automatic lawnmower, especially (in later use) one that is robotic.autonumber(computing) An automatically generated number.autoperformerOne who performs a work that they created themselves.autoplunger(pinball) An automatic plunger, one that propels the ball onto the table without being operated mechanically by the player.autopolar(electronics) Relating to or having autopolarity.autopolymer(dentistry) A dental resin that does not need heat or light to harden.autoprefixer(Internet) A software tool that adds vendor-specific prefixes to CSS (Cascading Style Sheets) code, for maximum compatibility across browsers.autoprojector(computing theory) A system that carries out autoprojection.autopsier(rare) One who carries out an autopsy.autorObsolete form of author.autoreceptor(biochemistry, medicine) A receptor, situated in the terminal of a presynaptic nerve cell, that is sensitive to neurotransmitters released by the neuron in whose membrane the autoreceptor sits.autorefractometer(ophthalmology) A device that uses infrared light to measure the refractive status of the eye.autorefractorAn automated refractor used to prepare a prescription for glasses or contact lensesautoregisterTo register automatically.autoregulator(genetics, biochemistry) Any protein that regulates its own expressionautorepressor(genetics) A protein that causes autorepressionautoresponder(computing) A computer program that automatically sends a certain message or messages in response to incoming e-mail.autosamplerAny of various devices that automate a sampling process.autoscaler(computing) A system that automatically increases or decreases the resources available to a process depending on need and availability.autoscroller(video games) A section of a video game which automatically scrolls the player through it, or in which the play area scrolls automatically and the player must keep up.autosearAlternative form of auto sear.autoselectorAn automatic selector.autosenderAn automatic sender.autosequencer(genetics) An automatic sequencerautoshredderA machine that destroys cars, turning them into scrap metal and other waste.autostabilizerAn automatic stabilizerautosteerTo steer automatically.autotimerAn automatic timer.autotitrator(chemistry) An automatic titratorautotomizerThat which autotomizes; that which sheds (a body part) by autotomy.autotrackerSomething which automatically tracks something else (such as the volume level of music, or the position of a military target).autotransformer(electrical engineering) A transformer with a single winding, its output being taken from taps.autotransporter(biochemistry) A structural domain found in some bacterial outer membrane proteins.autotunerAlternative form of auto-tuner.autourObsolete form of author.autovector(computing) An interrupt vector representing a priority level, from which the processor determines the actual target address.autowinder(photography) A device that winds on the film in a camera after each exposureautoworkerSomeone who works as an assembly line worker in an automobile assembly plant.autoxidator(chemistry) A substance that initiates or undergoes autoxidationautumnwearClothing to be worn in autumn.auxanometerAn instrument to measure the growth of plants.auxetometer(optics) An instrument for measuring the magnifying power of a lens or system of lenses.auxiliar(obsolete) auxiliaryauxlangerSomeone who creates auxiliary languages (auxlangs).auxometerAn instrument measuring the magnifying power of lenses.auxtetherAn auxiliary tether, especially on an electric sail.avaldarAlternative form of havildar.avalvularHaving no valvesavar(animation) an animation variableavascular(medicine) Lacking blood vessels.avatar(Hinduism) An incarnation of a deity, particularly Vishnu.avener(historical, obsolete) An officer of the king's stables whose duty it was to provide oats for the horses.avengerOne who avenges or vindicates.avenorAlternative form of avener.aver(ambitransitive) To assert the truth of (something); to affirm (something) with confidence; to declare (something) in a positive manner.averagerA system or process for computing averages.averruncatorAn instrument for pruning trees, consisting of two blades, or a blade and a hook, fixed on the end of a long rod.averterOne who, or that which, averts.avesicularNot vesicular.aviatorAn aircraft pilot, especially a military pilot. The use of the word may imply claims of superior airmanship, as in navy aviator vs. air force pilot.avicularOf or pertaining to a bird or to birds.avigatorAn aerial navigator.avitourA tour that has opportunities for birdwatchingavoiderOne who carries anything away, or the vessel in which things are carried away.avoucherOne who avouches.avouterer(obsolete) An adulterer.avoutrer(obsolete) Alternative form of avouterer.avowerA person who avowsavoyer(obsolete or historical) A chief magistrate of various free imperial cities or cantons of Switzerland.avtur(aviation) Jet fuel (fuel used by aircraft turbine engines).avuncularIn the manner of an uncle, pertaining to an uncle.awaiterOne who awaits.awakenerOne who, or that which, awakens.awakerOne who awakes.awarderOne who awards, or assigns by sentence or judicial determination; a judge, arbitrator or umpire.awatarArchaic form of avatar (“incarnation of a deity”).aweather(nautical) On the weather side, or toward the wind; in the direction from which the wind blows (See upwind)awnerA device for cutting the awns from grain.axillarAny of the feathers connecting the undersurface of the wing and the body, and concealed by the closed wing.axipolar(physics) Having the magnetic poles aligned with the axis of rotationaxiscylinderAlternative form of axis cylinder.ayr(Isle of Man) fatherayvarAlternative form of ajvar.azasugar(organic chemistry) A nitrogen derivative of a sugar in which a piperidine structure replaces a tetrahydropyran structure.azidosugar(organic chemistry) Any sugar in which a hydroxy group has been replaced by an azido groupazopolymer(organic chemistry) Any polymer of an azo compound, especially those used in thin films that have specialized optical propertiesazotobacterAny of various nitrogen-fixing bacteria in the genus Azotobacter.azotometer(inorganic chemistry, obsolete) An apparatus for measuring or determining the proportion of nitrogen.azurAlternative form of azure (“blue tincture in heraldry”).