| abetter | (noun) one who helps or encourages or incites another | Synonyms: abettor |
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| abhorrer | (noun) a signer of a 1679 address to Charles II in which those who petitioned for the reconvening of parliament were condemned and abhorred | - |
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| abjurer | (noun) a person who abjures | - |
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| abrader | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abradant |
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| abridger | (noun) one who shortens or abridges or condenses a written work | Synonyms: abbreviator |
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| absconder | (noun) a fugitive who runs away and hides to avoid arrest or prosecution | - |
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| abseiler | (noun) a person who descends down a nearly vertical face by using a doubled rope that is wrapped around the body and attached to some high point | Synonyms: rappeller |
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| absolver | (noun) someone who grants absolution | - |
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| absorber | (noun) (physics) material in a nuclear reactor that absorbs radiation | - |
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| abstainer | (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstinent, nondrinker |
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| (noun) someone who practices self denial as a spiritual discipline | Synonyms: ascetic |
| abstracter | (noun) one who makes abstracts or summarizes information | Synonyms: abstractor |
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| abuser | (noun) someone who abuses | Synonyms: maltreater |
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| abutter | (noun) the owner of contiguous property | - |
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| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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| accouter | (verb) provide with military equipment | Synonyms: accoutre |
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| accuser | (noun) someone who imputes guilt or blame | - |
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| achiever | (noun) a person with a record of successes | Synonyms: succeeder, success, winner |
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| acquirer | (noun) a corporation gaining financial control over another corporation or financial institution through a payment in cash or an exchange of stock | - |
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| (noun) the financial institution that dispenses cash in automated teller machines and collects a fee from the bank that issued the credit card | - |
| (noun) a credit card processing bank; merchants receive credit for credit card receipts less a processing fee | Synonyms: merchant bank |
| (noun) a person who acquires something (usually permanently) | - |
| actinometer | (noun) an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect) | - |
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| adapter | (noun) device that enables something to be used in a way different from that for which it was intended or makes different pieces of apparatus compatible | Synonyms: adaptor |
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| (noun) a musician who adapts a composition for particular voices or instruments or for another style of performance | Synonyms: arranger, transcriber |
| adder | (noun) small terrestrial viper common in northern Eurasia | Synonyms: common viper, Vipera berus |
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| (noun) a machine that adds numbers | - |
| (noun) a person who adds numbers | - |
| adducer | (noun) a discussant who offers an example or a reason or a proof | - |
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| adjuster | (noun) one who investigates insurance claims or claims for damages and recommends an effective settlement | Synonyms: adjustor, claim agent, claims adjuster, claims adjustor |
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| administer | (verb) give or apply (medications) | Synonyms: dispense |
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| (verb) administer or bestow, as in small portions | Synonyms: allot, deal, deal out, dish out, dispense, distribute, dole out, lot, mete out, parcel out, shell out |
| (verb) perform (a church sacrament) ritually | - |
| (verb) work in an administrative capacity; supervise or be in charge of | Synonyms: administrate |
| (verb) direct the taking of | - |
| admirer | (noun) someone who admires a young woman | Synonyms: adorer |
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| (noun) a person who backs a politician or a team etc. | Synonyms: booster, champion, friend, protagonist, supporter |
| (noun) a person who admires; someone who esteems or respects or approves | - |
| admonisher | (noun) someone who gives a warning so that a mistake can be avoided | Synonyms: monitor, reminder |
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| adopter | (noun) a person who adopts a child of other parents as his or her own child | Synonyms: adoptive parent |
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| adorer | (noun) someone who admires a young woman | Synonyms: admirer |
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| adsorber | (noun) an apparatus used in the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface. | - |
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| adulterer | (noun) someone who commits adultery or fornication | Synonyms: fornicator |
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| advancer | (noun) someone who advances | - |
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| adventurer | (noun) a person who enjoys taking risks | Synonyms: venturer |
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| (noun) someone who travels into little known regions (especially for some scientific purpose) | Synonyms: explorer |
| advertiser | (noun) someone whose business is advertising | Synonyms: adman, advertizer |
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| advertizer | (noun) someone whose business is advertising | Synonyms: adman, advertiser |
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| adviser | (noun) an expert who gives advice | Synonyms: advisor, consultant |
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| aether | (noun) a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves | Synonyms: ether |
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| affenpinscher | (noun) European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle | Synonyms: monkey dog, monkey pinscher |
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| affirmer | (noun) someone who claims to speak the truth | Synonyms: asserter, asseverator, avower, declarer |
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| aflicker | (adjective) shining unsteadily | Synonyms: flickering |
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| aflutter | (adjective) excited in anticipation | Synonyms: nervous |
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| after | (adjective) located farther aft | - |
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| (adverb) behind or in the rear | - |
| (adverb) happening at a time subsequent to a reference time | Synonyms: afterward, afterwards, later, later on, subsequently |
| afterburner | (noun) a device that injects fuel into a hot exhaust for extra thrust | - |
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| aglitter | (adjective) having brief brilliant points or flashes of light | Synonyms: coruscant, fulgid, glinting, glistering, glittering, glittery, scintillant, scintillating, sparkly |
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| airliner | (noun) a commercial airplane that carries passengers | - |
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| airmailer | (noun) a mailer for airmail | - |
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| alabaster | (adjective) of or resembling alabaster | Synonyms: alabastrine |
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| (noun) a very light white | - |
| (noun) a compact fine-textured, usually white gypsum used for carving | - |
| (noun) a hard compact kind of calcite | Synonyms: Mexican onyx, onyx marble, oriental alabaster |
| alder | (noun) north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the wood is rot-resistant | Synonyms: alder tree |
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| (noun) wood of any of various alder trees; resistant to underwater rot; used for bridges etc | - |
| algometer | (noun) device for measuring pain caused by pressure | - |
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| alkaliser | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkalizer, antacid, antiacid, gastric antacid |
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| alkalizer | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkaliser, antacid, antiacid, gastric antacid |
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| allayer | (noun) a person who reduces the intensity (e.g., of fears) and calms and pacifies | Synonyms: comforter, reliever |
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| allegoriser | (noun) someone who communicates in allegories | Synonyms: allegorizer |
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| allegorizer | (noun) someone who communicates in allegories | Synonyms: allegoriser |
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| allover | (adjective) covering the entire surface | - |
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| almoner | (noun) an official in a British hospital who looks after the social and material needs of the patients | Synonyms: medical social worker |
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| almsgiver | (noun) a person who gives alms | - |
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| alphabetiser | (noun) a literate person who can arrange items in alphabetical order | Synonyms: alphabetizer |
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| alphabetizer | (noun) a literate person who can arrange items in alphabetical order | Synonyms: alphabetiser |
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| alter | (verb) remove the ovaries of | Synonyms: castrate, neuter, spay |
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| (verb) become different in some particular way, without permanently losing one's or its former characteristics or essence | Synonyms: change, vary |
| (verb) cause to change; make different; cause a transformation | Synonyms: change, modify |
| (verb) insert words into texts, often falsifying it thereby | Synonyms: falsify, interpolate |
| (verb) make an alteration to | - |
| altimeter | (noun) an instrument that measures the height above ground; used in navigation | - |
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| altogether | (noun) informal terms for nakedness | Synonyms: birthday suit, raw |
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| (adverb) with everything included or counted | Synonyms: all told, in all |
| (adverb) with everything considered (and neglecting details) | Synonyms: all in all, on the whole, tout ensemble |
| (adverb) to a complete degree or to the full or entire extent; Completely or entirely | Synonyms: all, completely, entirely, right, totally, whole, wholly |
| amber | (adjective) of a medium to dark brownish yellow color | Synonyms: brownish-yellow, yellow-brown |
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| (noun) a deep yellow color | Synonyms: gold |
| (noun) a hard yellowish to brownish translucent fossil resin; used for jewelry | - |
| ambler | (noun) someone who walks at a leisurely pace | Synonyms: saunterer, stroller |
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| ambusher | (noun) an attacker who waits in a concealed position to launch a surprise attack | - |
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| ameer | (noun) an independent ruler or chieftain (especially in Africa or Arabia) | Synonyms: amir, emeer, emir |
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| ammeter | (noun) a meter that measures the flow of electrical current in amperes | - |
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| amphitheater | (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held | Synonyms: amphitheatre, coliseum |
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| (noun) a sloping gallery with seats for spectators (as in an operating room or theater) | Synonyms: amphitheatre |
| amplifier | (noun) electronic equipment that increases strength of signals passing through it | - |
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| analyser | (noun) an instrument that performs analyses | Synonyms: analyzer |
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| analyzer | (noun) an instrument that performs analyses | Synonyms: analyser |
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| anemoclinometer | (noun) A type of instrument which measures the inclination of the wind to the horizontal plane. | - |
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| anemometer | (noun) a gauge for recording the speed and direction of wind | Synonyms: wind gage, wind gauge |
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| anger | (noun) belligerence aroused by a real or supposed wrong (personified as one of the deadly sins) | Synonyms: ira, ire, wrath |
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| (noun) a strong emotion; a feeling that is oriented toward some real or supposed grievance | Synonyms: choler, ire |
| (noun) the state of being angry | Synonyms: angriness |
| (verb) make angry | - |
| (verb) become angry | Synonyms: see red |
| angledozer | (noun) a bulldozer with an angled moldboard to push earth to one side | - |
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| angler | (noun) fishes having large mouths with a wormlike filament attached for luring prey | Synonyms: allmouth, angler fish, anglerfish, goosefish, Lophius Americanus, lotte, monkfish |
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| (noun) a fisherman who uses a hook and line | Synonyms: troller |
| (noun) a scheming person; someone who schemes to gain an advantage | - |
| announcer | (noun) reads news, commercials on radio or television | - |
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| (noun) someone who proclaims a message publicly | - |
| annoyer | (noun) someone given to teasing (as by mocking or stirring curiosity) | Synonyms: tease, teaser, vexer |
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| anointer | (noun) one who anoints as a religious ceremony | - |
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| another | (adjective) any of various alternatives; some other; entity, singular, other pronoun; quantifier, singular, another | Synonyms: some other |
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| answer | (noun) a nonverbal reaction | - |
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| (noun) the speech act of replying to a question | - |
| (noun) a statement (either spoken or written) that is made to reply to a question or request or criticism or accusation | Synonyms: reply, response |
| (noun) a statement that solves a problem or explains how to solve the problem | Synonyms: resolution, result, solution, solvent |
| (noun) the principal pleading by the defendant in response to plaintiff's complaint; in criminal law it consists of the defendant's plea of `guilty' or `not guilty' (or nolo contendere); in civil law it must contain denials of all allegations in the plaintiff's complaint that the defendant hopes to controvert and it can contain affirmative defenses or counterclaims | - |
| (verb) give the correct answer or solution to | - |
| (verb) respond to a signal | - |
| (verb) understand the meaning of | Synonyms: resolve |
| (verb) react to a stimulus or command | - |
| (verb) react verbally | Synonyms: reply, respond |
| (verb) give a defence or refutation of (a charge) or in (an argument) | - |
| (verb) be satisfactory for; meet the requirements of or serve the purpose of | - |
| (verb) match or correspond | - |
| (verb) be liable or accountable | - |
| (verb) be sufficient; be adequate, either in quality or quantity | Synonyms: do, serve, suffice |
| answerer | (noun) someone who responds | Synonyms: respondent, responder |
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| anteater | (noun) any of several tropical American mammals of the family Myrmecophagidae which lack teeth and feed on ants and termites | Synonyms: New World anteater |
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| (noun) nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata | Synonyms: aardvark, ant bear, Orycteropus afer |
| (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia | Synonyms: echidna, spiny anteater |
| (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea | Synonyms: echidna, spiny anteater |
| (noun) toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites | Synonyms: pangolin, scaly anteater |
| (noun) small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct | Synonyms: banded anteater, Myrmecobius fasciatus, numbat |
| antechamber | (noun) a large entrance or reception room or area | Synonyms: anteroom, entrance hall, foyer, hall, lobby, vestibule |
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| anther | (noun) the part of the stamen that contains pollen; usually borne on a stalk | - |
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| anticancer | (adjective) used in the treatment of cancer | Synonyms: antineoplastic, antitumor, antitumour |
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| antimatter | (noun) matter consisting of elementary particles that are the antiparticles of those making up normal substances | - |
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| antler | (noun) deciduous horn of a member of the deer family | - |
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| aper | (noun) someone who copies the words or behavior of another | Synonyms: ape, copycat, emulator, imitator |
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| appeaser | (noun) someone who tries to bring peace by acceding to demands | - |
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| appetiser | (noun) food or drink to stimulate the appetite (usually served before a meal or as the first course) | Synonyms: appetizer, starter |
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| appetizer | (noun) food or drink to stimulate the appetite (usually served before a meal or as the first course) | Synonyms: appetiser, starter |
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| applauder | (noun) someone who applauds | Synonyms: clapper |
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| applier | (noun) a device for applying a substance | Synonyms: applicator |
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| (noun) a person who requests or seeks something such as assistance or employment or admission | Synonyms: applicant |
| appraiser | (noun) one who estimates officially the worth or value or quality of things | Synonyms: valuator |
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| (noun) one who determines authenticity (as of works of art) or who guarantees validity | Synonyms: authenticator |
| apprehender | (noun) a person who seizes or arrests (especially a person who seizes or arrests in the name of justice) | - |
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| (noun) a person who knows or apprehends | Synonyms: knower |
| approver | (noun) an authority with power to approve | - |
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| aquifer | (noun) underground bed or layer yielding ground water for wells and springs etc | - |
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| arbiter | (noun) someone chosen to judge and decide a disputed issue | Synonyms: arbitrator, umpire |
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| (noun) someone with the power to settle matters at will | Synonyms: supreme authority |
| arbitrager | (noun) someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential) | Synonyms: arb, arbitrageur |
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| archer | (noun) a person who is expert in the use of a bow and arrow | Synonyms: bowman |
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