| abetter | (noun) one who helps or encourages or incites another | Synonyms: abettor |
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| abstracter | (noun) one who makes abstracts or summarizes information | Synonyms: abstractor |
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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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| 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 |
| 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 | - |
| adopter | (noun) a person who adopts a child of other parents as his or her own child | Synonyms: adoptive parent |
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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 |
| aglitter | (adjective) having brief brilliant points or flashes of light | Synonyms: coruscant, fulgid, glinting, glistering, glittering, glittery, scintillant, scintillating, sparkly |
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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 |
| algometer | (noun) device for measuring pain caused by pressure | - |
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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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| 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 |
| 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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| anointer | (noun) one who anoints as a religious ceremony | - |
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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 |
| antimatter | (noun) matter consisting of elementary particles that are the antiparticles of those making up normal substances | - |
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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 |
| arrester | (noun) a restraint that slows airplanes as they land on the flight deck of an aircraft carrier | Synonyms: arrester hook |
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| assaulter | (noun) someone who attacks | Synonyms: aggressor, assailant, attacker |
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| assenter | (noun) a person who assents | - |
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| asserter | (noun) someone who claims to speak the truth | Synonyms: affirmer, asseverator, avower, declarer |
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| aster | (noun) star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis | - |
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| (noun) any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers | - |
| atmometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: evaporometer |
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| attempter | (noun) one who tries | Synonyms: essayer, trier |
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| attester | (noun) someone who affirms or vouches for the correctness or truth or genuineness of something | Synonyms: attestant |
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| attracter | (noun) a characteristic that provides pleasure and attracts | Synonyms: attraction, attractive feature, attractor, magnet |
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| (noun) (physics) a point in the ideal multidimensional phase space that is used to describe a system toward which the system tends to evolve regardless of the starting conditions of the system | Synonyms: attractor |
| (noun) an entertainer who attracts large audiences | Synonyms: attraction, attractor, draw, drawing card |
| audiometer | (noun) an instrument used to measure the sensitivity of hearing | Synonyms: sonometer |
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| babysitter | (noun) a person engaged to care for children when the parents are not home | Synonyms: baby-sitter, sitter |
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| backbiter | (noun) one who attacks the reputation of another by slander or libel | Synonyms: defamer, libeler, maligner, slanderer, traducer, vilifier |
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| backscatter | (verb) scatter (radiation) by the atoms of the medium through which it passes | - |
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| backwater | (noun) a place or condition in which no development or progress is occurring | - |
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| (noun) a body of water that was created by a flood or tide or by being held or forced back by a dam | - |
| baluster | (noun) one of a number of closely spaced supports for a railing | - |
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| bandmaster | (noun) the conductor of a band | - |
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| banister | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, balustrade, bannister, handrail |
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| bannister | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, balustrade, banister, handrail |
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| banter | (noun) light teasing repartee | Synonyms: backchat, give-and-take, raillery |
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| (verb) be silly or tease one another | Synonyms: chaff, jolly, josh, kid |
| barometer | (noun) an instrument that measures atmospheric pressure | - |
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| barrater | (noun) someone guilty of barratry | Synonyms: barrator |
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| barretter | (noun) a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations) | Synonyms: ballast, ballast resistor |
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| barrister | (noun) a British or Canadian lawyer who speaks in the higher courts of law on behalf of either the defense or prosecution | - |
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| barter | (noun) an equal exchange | Synonyms: swap, swop, trade |
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| (verb) exchange goods without involving money | - |
| barycenter | (noun) (astronomy) the common center of mass around which two or more bodies revolve | - |
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| baster | (noun) a tube with a rubber bulb used to take up and release melted fat or gravy in order to moisten roasting meat | - |
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| (noun) a sewer who fastens a garment with long loose stitches | Synonyms: tacker |
| (noun) a cook who bastes roasting meat with melted fat or gravy | - |
| bathometer | (noun) an instrument that measures the depth of water | Synonyms: bathymeter |
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| bathymeter | (noun) an instrument that measures the depth of water | Synonyms: bathometer |
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| batter | (noun) a liquid or semiliquid mixture, as of flour, eggs, and milk, used in cooking | - |
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| (noun) (baseball) a ballplayer who is batting | Synonyms: batsman, hitter, slugger |
| (verb) make a dent or impression in | Synonyms: dinge |
| (verb) strike violently and repeatedly | Synonyms: baste, clobber |
| (verb) strike against forcefully | Synonyms: buffet, knock about |
| beater | (noun) an implement for beating | - |
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| (noun) a worker who rouses wild game from under cover for a hunter | - |
| bedsitter | (noun) a furnished sitting room with sleeping accommodations (and some plumbing) | Synonyms: bedsit, bedsitting room |
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| bedwetter | (noun) someone suffering from enuresis; someone who urinates while asleep in bed | Synonyms: bed wetter, wetter |
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| beefeater | (noun) officer in the (ceremonial) bodyguard of the British monarch | Synonyms: yeoman, yeoman of the guard |
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| begetter | (noun) a male parent (also used as a term of address to your father) | Synonyms: father, male parent |
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| beplaster | (verb) cover conspicuously or thickly, as by pasting something on | Synonyms: plaster |
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| bespatter | (verb) spot, splash, or soil | Synonyms: spatter |
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| better | (adjective) (comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another | - |
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| (adjective) (comparative of `good') changed for the better in health or fitness | - |
| (adjective) (comparative and superlative of `well') wiser or more advantageous and hence advisable | Synonyms: best |
| (adjective) more than half | - |
| (noun) something superior in quality or condition or effect | - |
| (noun) the superior one of two alternatives | - |
| (noun) someone who bets | Synonyms: bettor, punter, wagerer |
| (noun) a superior person having claim to precedence | - |
| (adverb) comparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc. | - |
| (adverb) from a position of superiority or authority | Synonyms: best |
| (verb) get better | Synonyms: ameliorate, improve, meliorate |
| (verb) to make better | Synonyms: ameliorate, amend, improve, meliorate |
| (verb) surpass in excellence | Synonyms: break |
| bilgewater | (noun) pretentious or silly talk or writing | Synonyms: baloney, boloney, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
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| bimester | (noun) a period of 2 months | - |
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| bister | (noun) a water-soluble brownish-yellow pigment made by boiling wood soot | Synonyms: bistre |
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| biter | (noun) someone who bites | - |
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| bitter | (adjective) proceeding from or exhibiting great hostility or animosity | - |
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| (adjective) very difficult to accept or bear | - |
| (adjective) causing a sharply painful or stinging sensation; used especially of cold | Synonyms: biting |
| (adjective) marked by strong resentment or cynicism | Synonyms: acrimonious |
| (adjective) expressive of severe grief or regret | - |
| (adjective) causing a sharp and acrid taste experience | - |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| (noun) the property of having a harsh unpleasant taste | Synonyms: bitterness |
| (noun) the taste experience when quinine or coffee is taken into the mouth | Synonyms: bitterness |
| (noun) English term for a dry sharp-tasting ale with strong flavor of hops (usually on draft) | - |
| (adverb) extremely and sharply | Synonyms: bitingly, bitterly, piercingly |
| (verb) make bitter | - |
| blackwater | (noun) any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cells | - |
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| blaster | (noun) a workman employed to blast with explosives | Synonyms: chargeman |
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| blighter | (noun) a persistently annoying person | Synonyms: cuss, gadfly, pest, pesterer |
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| (noun) a boy or man | Synonyms: bloke, chap, cuss, fella, feller, fellow, gent, lad |
| blister | (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: bleb, bulla |
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| (noun) (botany) a swelling on a plant similar to that on the skin | - |
| (noun) a flaw on a surface resulting when an applied substance does not adhere (as an air bubble in a coat of paint) | - |
| (verb) get blistered | Synonyms: vesicate |
| (verb) cause blisters to form on | - |
| (verb) subject to harsh criticism | Synonyms: scald, scorch, whip |
| bloater | (noun) large fatty herring lightly salted and briefly smoked | - |
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| blockbuster | (noun) an unusually successful hit with widespread popularity and huge sales (especially a movie or play or recording or novel) | Synonyms: megahit, smash hit |
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| (noun) a large bomb used to demolish extensive areas (as a city block) | - |
| blotter | (noun) the daily written record of events (as arrests) in a police station | Synonyms: charge sheet, day book, police blotter, rap sheet |
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| (noun) absorbent paper used to dry ink | Synonyms: blotting paper |
| bluster | (noun) a swaggering show of courage | Synonyms: bravado |
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| (noun) vain and empty boasting | Synonyms: braggadocio, rhodomontade, rodomontade |
| (noun) a violent gusty wind | - |
| (noun) noisy confusion and turbulence | - |
| (verb) act in an arrogant, overly self-assured, or conceited manner | Synonyms: swagger, swash |
| (verb) show off | Synonyms: blow, boast, brag, gas, gasconade, shoot a line, swash, tout, vaunt |
| (verb) blow hard; be gusty, as of wind | - |
| boaster | (noun) a very boastful and talkative person | Synonyms: blowhard, braggart, bragger, line-shooter, vaunter |
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| boater | (noun) a stiff hat made of straw with a flat crown | Synonyms: leghorn, Panama, Panama hat, sailor, skimmer, straw hat |
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| (noun) someone who drives or rides in a boat | Synonyms: boatman, waterman |
| bolometer | (noun) an instrument that measures heat radiation; extremely sensitive | - |
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| bolster | (noun) a pillow that is often put across a bed underneath the regular pillows | Synonyms: long pillow |
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| (verb) add padding to | Synonyms: pad |
| (verb) support and strengthen | Synonyms: bolster up |
| (verb) prop up with a pillow or bolster | - |
| bonesetter | (noun) someone (not necessarily a licensed physician) who sets broken bones | - |
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| booster | (noun) an additional dose that makes sure the first dose was effective | Synonyms: booster dose, booster shot, recall dose |
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| (noun) the first stage of a multistage rocket | Synonyms: booster rocket, booster unit, takeoff booster, takeoff rocket |
| (noun) an amplifier for restoring the strength of a transmitted signal | Synonyms: booster amplifier, booster station, relay link, relay station, relay transmitter |
| (noun) a thief who steals goods that are in a store | Synonyms: lifter, shoplifter |
| (noun) someone who is an active supporter and advocate | Synonyms: plugger, promoter |
| (noun) a person who backs a politician or a team etc. | Synonyms: admirer, champion, friend, protagonist, supporter |
| breakwater | (noun) a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away | Synonyms: bulwark, groin, groyne, jetty, mole, seawall |
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| broadcaster | (noun) a mechanical device for scattering something (seed or fertilizer or sand etc.) in all directions | Synonyms: spreader |
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| (noun) someone who broadcasts on radio or television | - |
| broncobuster | (noun) a person who breaks horses | Synonyms: bronco buster, buster |
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| bullfighter | (noun) someone who fights bulls | Synonyms: toreador |
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| bunter | (noun) a batter who bunts | - |
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| burgomaster | (noun) a mayor of a municipality in Germany or Holland or Flanders or Austria | - |
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| burster | (noun) a quantity of explosive to be set off at one time | Synonyms: bursting charge, charge, explosive charge |
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| buster | (noun) a person (or thing) that breaks up or overpowers something | - |
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| (noun) a person who breaks horses | Synonyms: bronco buster, broncobuster |
| (noun) a robust child | - |
| (noun) an informal form of address for a man | Synonyms: dude, fellow |
| (noun) a person born in the generation following the baby boom when the birth rate fell dramatically | Synonyms: baby buster |
| butter | (noun) an edible emulsion of fat globules made by churning milk or cream; for cooking and table use | - |
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| (noun) a fighter who strikes the opponent with his head | - |
| (verb) spread butter on | - |
| cadaster | (noun) a public register showing the details of ownership and value of land; made for the purpose of taxation | Synonyms: cadastre |
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| calorimeter | (noun) a measuring instrument that determines quantities of heat | - |
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| calypter | (noun) scalelike structure between the base of the wing and the halter of a two-winged fly | Synonyms: alula |
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| canecutter | (noun) a wood rabbit of southeastern United States swamps and lowlands | Synonyms: swamp hare, swamp rabbit, Sylvilagus aquaticus |
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| canister | (noun) metal container for storing dry foods such as tea or flour | Synonyms: cannister, tin |
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| (noun) a metallic cylinder packed with shot and used as ammunition in a firearm | Synonyms: canister shot, case shot |
| cannister | (noun) metal container for storing dry foods such as tea or flour | Synonyms: canister, tin |
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| canter | (noun) a smooth three-beat gait; between a trot and a gallop | Synonyms: lope |
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| (verb) ride at a canter | - |
| (verb) go at a canter, of horses | - |
| (verb) cause to ride at a cantering pace | - |
| carpenter | (noun) a woodworker who makes or repairs wooden objects | - |
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| (verb) work as a carpenter | - |
| carter | (noun) someone whose work is driving carts | - |
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| caster | (noun) a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable | Synonyms: castor |
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| (noun) a shaker with a perforated top for sprinkling powdered sugar | Synonyms: castor |
| (noun) a worker who casts molten metal into finished products | - |