| chromosphere | (noun) a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun | - |
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| chrysotherapy | (noun) the use of chemicals containing gold for treating diseases (such as rheumatoid arthritis) | - |
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| cinematographer | (noun) a photographer who operates a movie camera | Synonyms: camera operator, cameraman |
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| cipher | (noun) a secret method of writing | Synonyms: cryptograph, cypher, secret code |
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| (noun) a message written in a secret code | Synonyms: cypher |
| (noun) a person of no influence | Synonyms: cypher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cypher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cypher, nought, zero |
| (verb) make a mathematical calculation or computation | Synonyms: calculate, compute, cypher, figure, reckon, work out |
| (verb) convert ordinary language into code | Synonyms: code, cypher, encipher, encrypt, inscribe, write in code |
| cither | (noun) a musical stringed instrument with strings stretched over a flat sounding board; it is laid flat and played with a plectrum and with fingers | Synonyms: zither, zithern |
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| (noun) a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings | Synonyms: cithern, citole, cittern, gittern |
| cithern | (noun) a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings | Synonyms: cither, citole, cittern, gittern |
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| clincher | (noun) a tool used to clinch nails or bolts or rivets | - |
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| (noun) a point or fact or remark that settles something conclusively | Synonyms: decisive factor |
| (noun) an argument that is conclusive | Synonyms: determiner, determining factor |
| cohere | (verb) come or be in close contact with; stick or hold together and resist separation | Synonyms: adhere, cleave, cling, stick |
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| (verb) have internal elements or parts logically connected so that aesthetic consistency results | - |
| (verb) cause to form a united, orderly, and aesthetically consistent whole | - |
| coherence | (noun) logical and orderly and consistent relation of parts | Synonyms: coherency |
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| (noun) the state of cohering or sticking together | Synonyms: coherency, cohesion, cohesiveness |
| coherency | (noun) logical and orderly and consistent relation of parts | Synonyms: coherence |
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| (noun) the state of cohering or sticking together | Synonyms: coherence, cohesion, cohesiveness |
| coherent | (adjective) marked by an orderly, logical, and aesthetically consistent relation of parts | Synonyms: consistent, logical, ordered |
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| (adjective) (physics) of waves having a constant phase relation | - |
| (adjective) sticking together | Synonyms: tenacious |
| (adjective) capable of thinking and expressing yourself in a clear and consistent manner | Synonyms: logical, lucid |
| coherently | (adverb) in a coherent manner | - |
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| cosher | (adjective) conforming to Jewish dietary laws | Synonyms: kosher |
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| cosmographer | (noun) a scientist knowledgeable about cosmography | Synonyms: cosmographist |
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| cowcatcher | (noun) an inclined metal frame at the front of a locomotive to clear the track | Synonyms: buffer, fender, pilot |
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| cowherb | (noun) European annual with pale rose-colored flowers; cultivated flower or self-sown grainfield weed; introduced in North America; sometimes classified as a soapwort | Synonyms: cow cockle, Saponaria vaccaria, Vaccaria hispanica, Vaccaria pyramidata |
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| cowherd | (noun) a hired hand who tends cattle and performs other duties on horseback | Synonyms: cowhand, cowpoke, cowpuncher, puncher |
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| cowpuncher | (noun) a hired hand who tends cattle and performs other duties on horseback | Synonyms: cowhand, cowherd, cowpoke, puncher |
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| crasher | (noun) someone who gets in (to a party) without an invitation or without paying | Synonyms: gatecrasher, unwelcome guest |
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| crossbencher | (noun) a member of the House of Commons who does not vote regularly with either the government or the Opposition | - |
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| crusher | (noun) a device that crushes something | - |
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| cryptographer | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptanalyst, cryptologist |
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| crystallographer | (noun) a specialist in crystallography | - |
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| cypher | (noun) a secret method of writing | Synonyms: cipher, cryptograph, secret code |
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| (noun) a message written in a secret code | Synonyms: cipher |
| (noun) a person of no influence | Synonyms: cipher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cipher, nought, zero |
| (verb) make a mathematical calculation or computation | Synonyms: calculate, cipher, compute, figure, reckon, work out |
| (verb) convert ordinary language into code | Synonyms: cipher, code, encipher, encrypt, inscribe, write in code |
| debaucher | (noun) someone who assaults others sexually | Synonyms: ravisher, violator |
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| debauchery | (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanal, bacchanalia, debauch, drunken revelry, orgy, riot, saturnalia |
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| decipher | (verb) read with difficulty | Synonyms: trace |
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| (verb) convert code into ordinary language | Synonyms: decode, decrypt |
| decipherable | (adjective) easily deciphered | Synonyms: clear, readable |
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| decipherably | (adverb) in a legible manner | Synonyms: legibly, readably |
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| deciphered | (adjective) converted from cryptic to intelligible language | - |
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| decipherer | (noun) a reader capable of reading and interpreting illegible or obscure text | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decoder |
| decipherment | (noun) the activity of making clear or converting from code into plain text | Synonyms: decoding, decryption |
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| demographer | (noun) a scientist who studies the growth and density of populations and their vital statistics | Synonyms: demographist, population scientist |
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| diapheromera | (noun) a variety of stick insect | Synonyms: Diapheromera femorata |
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| diathermy | (noun) a method of physical therapy that involves generating local heat in body tissues by high-frequency electromagnetic currents | - |
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| diphtheria | (noun) acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing | - |
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| dishwasher | (noun) a machine for washing dishes | Synonyms: dish washer, dishwashing machine |
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| (noun) someone who washes dishes | - |
| disinherit | (verb) prevent deliberately (as by making a will) from inheriting | Synonyms: disown |
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| disinheritance | (noun) the act by a donor that terminates the right of a person to inherit | - |
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| disinherited | (adjective) deprived of your rightful heritage | - |
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| dispatcher | (noun) the official who signals the beginning of a race or competition | Synonyms: starter |
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| (noun) employee of a transportation company who controls the departures of vehicles according to weather conditions and in the interest of efficient service | - |
| dither | (noun) an excited state of agitation | Synonyms: flap, fuss, pother, tizzy |
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| (verb) make a fuss; be agitated | Synonyms: flap, pother |
| (verb) act nervously; be undecided; be uncertain | - |
| dithering | (noun) the process of representing intermediate colors by patterns of tiny colored dots that simulate the desired color | - |
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| dowitcher | (noun) shorebird of the sandpiper family that resembles a snipe | - |
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| druthers | (noun) the right or chance to choose | Synonyms: preference |
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| ectotherm | (noun) an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals | Synonyms: poikilotherm |
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| ectothermic | (adjective) of animals except birds and mammals; having body temperature that varies with the environment | Synonyms: heterothermic, poikilothermic, poikilothermous |
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| either | (adverb) after a negative statement used as an intensive meaning something like `likewise' or `also' | - |
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| electrotherapist | (noun) someone who specializes in the treatment of disease by electricity | - |
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| electrotherapy | (noun) the therapeutic application of electricity to the body (as in the treatment of various forms of paralysis) | Synonyms: electric healing, electrical healing, galvanism |
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| elsewhere | (adverb) in or to another place | - |
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| encipher | (verb) convert ordinary language into code | Synonyms: cipher, code, cypher, encrypt, inscribe, write in code |
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| encroacher | (noun) someone who enters by force in order to conquer | Synonyms: invader |
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| endothermal | (adjective) (of a chemical reaction or compound) occurring or formed with absorption of heat | Synonyms: endothermic, heat-absorbing |
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| endothermic | (adjective) (of a chemical reaction or compound) occurring or formed with absorption of heat | Synonyms: endothermal, heat-absorbing |
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| escherichia | (noun) a genus of enteric bacteria | - |
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| etcher | (noun) someone who etches | - |
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| ether | (noun) a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic | Synonyms: diethyl ether, divinyl ether, ethoxyethane, ethyl ether, vinyl ether |
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| (noun) a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves | Synonyms: aether |
| (noun) any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom | - |
| (noun) the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies | Synonyms: quintessence |
| ethereal | (adjective) of or containing or dissolved in ether | - |
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| (adjective) characterized by unusual lightness and delicacy | Synonyms: gossamer |
| (adjective) of heaven or the spirit | Synonyms: celestial, supernal |
| (adjective) characterized by lightness and insubstantiality; as impalpable or intangible as air | Synonyms: aerial, aeriform, aery, airy |
| etherealize | (verb) make ethereal | Synonyms: etherialise |
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| etherialise | (verb) make ethereal | Synonyms: etherealize |
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| etherify | (verb) change into an ether | - |
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| etherise | (verb) anesthetize with ether | Synonyms: etherize |
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| etherize | (verb) anesthetize with ether | Synonyms: etherise |
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| ethernet | (noun) a type of network technology for local area networks; coaxial cable carries radio frequency signals between computers at a rate of 10 megabits per second | - |
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| ethnographer | (noun) an anthropologist who does ethnography | - |
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| eutherian | (adjective) of or relating to or belonging to the subclass Eutheria | - |
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| (noun) mammals having a placenta; all mammals except monotremes and marsupials | Synonyms: eutherian mammal, placental, placental mammal |
| everywhere | (adverb) to or in any or all places; pronoun, location; quantifier: universal | Synonyms: all over, everyplace |
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| exosphere | (noun) the outermost atmospheric layer | - |
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| exotherm | (noun) a compound that gives off heat during its formation and absorbs heat during its decomposition | - |
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| exothermal | (adjective) (of a chemical reaction or compound) occurring or formed with the liberation of heat | Synonyms: exothermic, heat-releasing |
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| exothermic | (adjective) (of a chemical reaction or compound) occurring or formed with the liberation of heat | Synonyms: exothermal, heat-releasing |
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| extinguisher | (noun) a manually operated device for extinguishing small fires | Synonyms: asphyxiator, fire extinguisher |
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| farther | (adjective) more distant in especially space or time | - |
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| (adjective) more distant in especially degree | Synonyms: further |
| (adverb) to or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense) | Synonyms: further |
| (adverb) to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense) | Synonyms: further |
| farthermost | (adjective) (comparatives of `far') most remote in space or time or order | Synonyms: farthest, furthermost, furthest, utmost, uttermost |
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| father | (noun) a male parent (also used as a term of address to your father) | Synonyms: begetter, male parent |
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| (noun) the founder of a family | Synonyms: forefather, sire |
| (noun) a person who holds an important or distinguished position in some organization | - |
| (noun) a person who founds or establishes some institution | Synonyms: beginner, founder, founding father |
| (noun) the head of an organized crime family | Synonyms: don |
| (verb) make (offspring) by reproduction | Synonyms: beget, bring forth, engender, generate, get, mother, sire |
| fatherhood | (noun) the status of a father | - |
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| (noun) the status of a religious leader | - |
| (noun) the kinship relation between an offspring and the father | Synonyms: paternity |
| fatherland | (noun) the country where you were born | Synonyms: country of origin, homeland, mother country, motherland, native land |
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| fatherless | (adjective) not having a known or legally responsible father | - |
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| (adjective) having no living father | - |
| fatherlike | (adjective) like or befitting a father or fatherhood; kind and protective | Synonyms: fatherly |
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| fatherliness | (noun) the benignity and protectiveness of or befitting a father | Synonyms: paternal quality |
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| fatherly | (adjective) like or befitting a father or fatherhood; kind and protective | Synonyms: fatherlike |
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| feather | (noun) turning an oar parallel to the water between pulls | Synonyms: feathering |
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| (noun) branching, hair-like structure that grows on the bodies of birds | - |
| (verb) grow feathers | Synonyms: fledge |
| (verb) turn the oar, while rowing | Synonyms: square |
| (verb) turn the paddle; in canoeing | Synonyms: square |
| (verb) cover or fit with feathers | - |
| (verb) join tongue and groove, in carpentry | - |
| featherbed | (noun) a mattress stuffed with feathers | Synonyms: feather bed |
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| (verb) hire more workers than are necessary | - |
| (verb) treat with excessive indulgence | Synonyms: baby, cocker, coddle, cosset, indulge, mollycoddle, pamper, spoil |
| featherbedding | (noun) the practice (usually by a labor union) of requiring an employer to hire more workers than are required | - |
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| featherbrained | (adjective) lacking seriousness; given to frivolity | Synonyms: airheaded, dizzy, empty-headed, giddy, light-headed, lightheaded, silly |
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| feathered | (adjective) having or covered with feathers | - |
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| (adjective) adorned with feathers or plumes | Synonyms: feathery, plumy |
| featheredge | (noun) a thin tapering edge | - |
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| featheredged | (adjective) having a rough edge; used of handmade paper or paper resembling handmade | Synonyms: deckle-edged, deckled |
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| featherfoil | (noun) a plant of the genus Hottonia | Synonyms: feather-foil |
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| featheriness | (noun) a light softness | Synonyms: downiness, fluffiness |
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| feathering | (noun) turning an oar parallel to the water between pulls | Synonyms: feather |
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| featherless | (adjective) having no feathers | Synonyms: unfeathered |
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| featherlike | (adjective) resembling or suggesting a feather or feathers | Synonyms: feathery |
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| feathertop | (noun) northeastern tropical African plant having feathery panicles | Synonyms: feathertop grass, Pennistum villosum |
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| (noun) a variety of reed grass | Synonyms: Calamagrostis acutiflora, feather reed grass |
| featherweight | (noun) A weight class division in combat sports, for fighters heavier than those in the bantamweight division and lighter than those in the lightweight division. | - |
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| (noun) a professional boxer who weighs between 123 and 126 pounds | - |
| (noun) weighs 126-139 pounds | - |
| (noun) an amateur boxer who weighs no more than 126 pounds | - |
| feathery | (adjective) adorned with feathers or plumes | Synonyms: feathered, plumy |
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| (adjective) characterized by a covering of feathers | - |
| (adjective) resembling or suggesting a feather or feathers | Synonyms: featherlike |
| finisher | (noun) an animal that wins in a contest of speed | - |
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| (noun) a race car that finishes a race | - |
| (noun) a worker who performs the last step in a manufacturing process | - |
| (noun) a painter who applies a finishing coat | - |
| (noun) (baseball) a relief pitcher who can protect a lead in the last inning or two of the game | Synonyms: closer |
| (noun) a racing driver who finishes a race | - |
| fisher | (noun) large dark brown North American arboreal carnivorous mammal | Synonyms: black cat, fisher cat, Martes pennanti, pekan |
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| (noun) someone whose occupation is catching fish | Synonyms: fisherman |
| fisherman | (noun) someone whose occupation is catching fish | Synonyms: fisher |
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