| coach | (noun) a carriage pulled by four horses with one driver | Synonyms: coach-and-four, four-in-hand |
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| (noun) a railcar where passengers ride | Synonyms: carriage, passenger car |
| (noun) a vehicle carrying many passengers; used for public transport | Synonyms: autobus, bus, charabanc, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle |
| (noun) a person who gives private instruction (as in singing, acting, etc.) | Synonyms: private instructor, tutor |
| (noun) (sports) someone in charge of training an athlete or a team | Synonyms: handler, manager |
| coachbuilder | (noun) a craftsman who makes the bodies of motor vehicles | - |
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| coaching | (noun) the job of a professional coach | Synonyms: coaching job |
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| coachman | (noun) a man who drives a coach (or carriage) | - |
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| coachwhip | (noun) a whipsnake of southern United States and Mexico; tail resembles a braided whip | Synonyms: coachwhip snake, Masticophis flagellum |
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| (noun) desert shrub of southwestern United States and Mexico having slender naked spiny branches that after the rainy season put forth foliage and clusters of red flowers | Synonyms: Fouquieria splendens, Jacob's staff, ocotillo, vine cactus |
| coaction | (noun) act of working jointly | Synonyms: collaboration |
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| coadjutor | (noun) an assistant to a bishop | - |
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| coagulant | (noun) an agent that produces coagulation | Synonyms: coagulator |
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| coagulase | (noun) an enzyme that induces coagulation | - |
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| coagulation | (noun) the process of forming semisolid lumps in a liquid | Synonyms: clotting, curdling |
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| coagulator | (noun) an agent that produces coagulation | Synonyms: coagulant |
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| coagulum | (noun) a lump of material formed from the content of a liquid | Synonyms: clot |
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| coal | (noun) a hot fragment of wood or coal that is left from a fire and is glowing or smoldering | Synonyms: ember |
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| (noun) fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period | - |
| coalbin | (noun) a bin for holding coal | Synonyms: coalhole |
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| coalescence | (noun) the union of diverse things into one body or form or group; the growing together of parts | Synonyms: coalescency, coalition, concretion, conglutination |
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| coalescency | (noun) the union of diverse things into one body or form or group; the growing together of parts | Synonyms: coalescence, coalition, concretion, conglutination |
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| coalface | (noun) the part of a coal seam that is being cut | - |
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| coalfield | (noun) a region where there is coal underground | - |
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| coalhole | (noun) a bin for holding coal | Synonyms: coalbin |
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| coalition | (noun) the union of diverse things into one body or form or group; the growing together of parts | Synonyms: coalescence, coalescency, concretion, conglutination |
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| (noun) an organization of people (or countries) involved in a pact or treaty | Synonyms: alignment, alinement, alliance |
| (noun) the state of being combined into one body | Synonyms: fusion |
| coalman | (noun) someone who delivers coal | - |
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| coalpit | (noun) a mine where coal is dug from the ground | Synonyms: coal mine |
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| coaming | (noun) a raised framework around a hatchway on a ship to keep water out | - |
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| coarctation | (noun) (biology) a narrowing or constriction of a vessel or canal; especially a congenital narrowing of the aorta | - |
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| (noun) tight or narrow compression | Synonyms: constriction |
| coarseness | (noun) looseness or roughness in texture (as of cloth) | Synonyms: nubbiness, tweediness |
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| (noun) the quality of being composed of relatively large particles | Synonyms: graininess, granularity |
| (noun) the quality of lacking taste and refinement | Synonyms: commonness, grossness, raunch, vulgarism, vulgarity |
| (noun) language or humor that is down-to-earth | Synonyms: saltiness |
| coast | (noun) the act of moving smoothly along a surface while remaining in contact with it | Synonyms: glide, slide |
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| (noun) the area within view | - |
| (noun) the shore of a sea or ocean | Synonyms: sea-coast, seacoast, seashore |
| (noun) a slope down which sleds may coast | - |
| coaster | (noun) a covering (plate or mat) that protects the surface of a table (i.e., from the condensation on a cold glass or bottle) | - |
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| (noun) someone who coasts | - |
| (noun) a resident of a coastal area | - |
| coastguard | (noun) a military service responsible for the safety of maritime traffic in coastal waters | - |
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| coastguardsman | (noun) a member of a coastguard | - |
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| coastland | (noun) land in a coastal area | - |
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| coastline | (noun) the outline of a coast | - |
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| coat | (noun) growth of hair or wool or fur covering the body of an animal | Synonyms: pelage |
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| (noun) an outer garment that has sleeves and covers the body from shoulder down; worn outdoors | - |
| (noun) a thin layer covering something | Synonyms: coating |
| coatdress | (noun) a dress that is tailored like a coat and buttons up the front | - |
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| coatee | (noun) a short close-fitting coat | - |
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| coati | (noun) omnivorous mammal of Central America and South America | Synonyms: coati-mondi, coati-mundi, coon cat, Nasua narica |
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| coating | (noun) the work of applying something | Synonyms: application, covering |
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| (noun) a thin layer covering something | Synonyms: coat |
| (noun) a heavy fabric suitable for coats | - |
| (noun) a decorative texture or appearance of a surface (or the substance that gives it that appearance) | Synonyms: finish, finishing |
| coatrack | (noun) a rack with hooks for temporarily holding coats and hats | Synonyms: coat rack, hatrack |
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| coatroom | (noun) a room where coats and other articles can be left temporarily | Synonyms: cloakroom |
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| coattail | (noun) the loose back flap of a coat that hangs below the waist | - |
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| coauthor | (noun) a writer who collaborates with others in writing something | Synonyms: joint author |
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| coax | (noun) a transmission line for high-frequency signals | Synonyms: coax cable, coaxial cable |
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| coaxer | (noun) someone who tries to persuade by blandishment and coaxing | Synonyms: wheedler |
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| coaxing | (noun) flattery designed to gain favor | Synonyms: blarney, soft soap, sweet talk |
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| cob | (noun) adult male swan | - |
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| (noun) stocky short-legged harness horse | - |
| (noun) white gull having a black back and wings | Synonyms: black-backed gull, great black-backed gull, Larus marinus |
| (noun) nut of any of several trees of the genus Corylus | Synonyms: cobnut, filbert, hazelnut |
| cobalamin | (noun) a B vitamin that is used to treat pernicious anemia | Synonyms: antipernicious anemia factor, cyanocobalamin, vitamin B12 |
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| cobalt | (noun) a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition | Synonyms: atomic number 27, Co |
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| cobaltite | (noun) a rare silvery-white mineral; important ore of cobalt | - |
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| cobber | (noun) Australian term for a pal | - |
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| cobble | (noun) rectangular paving stone with curved top; once used to make roads | Synonyms: cobblestone, sett |
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| cobbler | (noun) a pie made of fruit with rich biscuit dough usually only on top of the fruit | Synonyms: deep-dish pie |
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| (noun) tall sweetened iced drink of wine or liquor with fruit | - |
| (noun) a person who makes or repairs shoes | Synonyms: shoemaker |
| cobblers | (noun) a man's testicles | - |
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| (noun) nonsense | - |
| cobblestone | (noun) rectangular paving stone with curved top; once used to make roads | Synonyms: cobble, sett |
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| cobbling | (noun) the shoemaker's trade | Synonyms: shoe repairing, shoemaking |
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| cobia | (noun) large dark-striped tropical food and game fish related to remoras; found worldwide in coastal to open waters | Synonyms: Rachycentron canadum, sergeant fish |
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| cobnut | (noun) nut of any of several trees of the genus Corylus | Synonyms: cob, filbert, hazelnut |
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| (noun) small nut-bearing tree much grown in Europe | Synonyms: Corylus avellana, Corylus avellana grandis, filbert |
| cobra | (noun) venomous Asiatic and African elapid snakes that can expand the skin of the neck into a hood | - |
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| cobweb | (noun) a dense elaborate spider web that is more efficient than the orb web | - |
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| (noun) filaments from a web that was spun by a spider | Synonyms: gossamer |
| (noun) a fabric so delicate and transparent as to resemble a web of a spider | - |
| coca | (noun) dried leaves of the coca plant (and related plants that also contain cocaine); chewed by Andean people for their stimulating effect | - |
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| (noun) a South American shrub whose leaves are chewed by natives of the Andes; a source of cocaine | Synonyms: coca plant, Erythroxylon coca |
| cocain | (noun) a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive | Synonyms: cocaine |
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| cocaine | (noun) a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive | Synonyms: cocain |
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| cocarboxylase | (noun) a coenzyme important in respiration in the Krebs cycle | Synonyms: thiamine pyrophosphate |
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| cocci | (noun) any spherical or nearly spherical bacteria | Synonyms: coccus |
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| coccidioidomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidiomycosis, desert rheumatism, valley fever |
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| coccidiomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidioidomycosis, desert rheumatism, valley fever |
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| coccidiosis | (noun) (veterinary medicine) infestation with coccidia | - |
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| coccidium | (noun) parasitic on the digestive epithelium of vertebrates and higher invertebrates | Synonyms: eimeria |
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| coccobacillus | (noun) a bacterial cell intermediate in morphology between a coccus and a bacillus; a very short bacillus | - |
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| coccus | (noun) any spherical or nearly spherical bacteria | Synonyms: cocci |
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| coccyx | (noun) the end of the vertebral column in humans and tailless apes | Synonyms: tail bone |
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| cochin | (noun) Asian breed of large fowl with dense plumage and feathered legs | Synonyms: cochin china |
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| cochineal | (noun) Mexican red scale insect that feeds on cacti; the source of a red dye | Synonyms: cochineal insect, Dactylopius coccus |
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| (noun) a red dyestuff consisting of dried bodies of female cochineal insects | - |
| cochlea | (noun) the snail-shaped tube (in the inner ear coiled around the modiolus) where sound vibrations are converted into nerve impulses by the organ of Corti | - |
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| cock | (noun) adult male bird | - |
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| (noun) adult male chicken | Synonyms: rooster |
| (noun) faucet consisting of a rotating device for regulating flow of a liquid | Synonyms: stopcock, turncock |
| (noun) the part of a gunlock that strikes the percussion cap when the trigger is pulled | Synonyms: hammer |
| (noun) obscene terms for penis | Synonyms: dick, pecker, prick, putz, shaft, tool |
| cockade | (noun) an ornament (such as a knot of ribbon or a rosette) usually worn on the hat | - |
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| cockateel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockatiel, cockatoo parrot, Nymphicus hollandicus |
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| cockatiel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockateel, cockatoo parrot, Nymphicus hollandicus |
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| cockatoo | (noun) white or light-colored crested parrot of the Australian region; often kept as cage birds | - |
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| cockatrice | (noun) monster hatched by a reptile from a cock's egg; able to kill with a glance | - |
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| cockchafer | (noun) any of various large European beetles destructive to vegetation as both larvae and adult | Synonyms: May beetle, May bug, Melolontha melolontha |
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| cockcrow | (noun) the first light of day | Synonyms: aurora, break of day, break of the day, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
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| cocker | (noun) a small breed with wavy silky hair; originally developed in England | Synonyms: cocker spaniel, English cocker spaniel |
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| cockerel | (noun) a young domestic cock; not older than one year | - |
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| cockfight | (noun) a match in a cockpit between two fighting cocks heeled with metal gaffs | - |
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| cockfighting | (noun) participation in the sport of matching gamecocks in a cockfight | - |
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| cockhorse | (noun) anything used as a toy horse (such as a rocking horse or one knee of an adult) | - |
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| cockiness | (noun) offensive boldness and assertiveness | Synonyms: bumptiousness, forwardness, pushiness |
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| cockle | (noun) common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs | - |
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| (noun) common edible European bivalve | - |
| cocklebur | (noun) any coarse weed of the genus Xanthium having spiny burrs | Synonyms: cockle-bur, cockle-burr, cockleburr |
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| (noun) burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use | Synonyms: Arctium lappa, great burdock, greater burdock |
| cockleburr | (noun) any coarse weed of the genus Xanthium having spiny burrs | Synonyms: cockle-bur, cockle-burr, cocklebur |
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| cockleshell | (noun) a small light flimsy boat | - |
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| cockloft | (noun) a small loft or garret | - |
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| cockney | (noun) the nonstandard dialect of natives of the east end of London | - |
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| cockpit | (noun) compartment where the pilot sits while flying the aircraft | - |
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| (noun) seat where the driver sits while driving a racing car | - |
| (noun) a pit for cockfights | - |
| cockroach | (noun) any of numerous chiefly nocturnal insects; some are domestic pests | Synonyms: roach |
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| cockscomb | (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: comb, coxcomb |
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| (noun) a cap worn by court jesters; adorned with a strip of red | Synonyms: coxcomb |
| (noun) a conceited dandy who is overly impressed by his own accomplishments | Synonyms: coxcomb |
| (noun) garden annual with featherlike spikes of red or yellow flowers | Synonyms: Celosia argentea cristata, Celosia cristata, common cockscomb |
| cocksfoot | (noun) widely grown stout Old World hay and pasture grass | Synonyms: cockspur, Dactylis glomerata, orchard grass |
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| cockspur | (noun) small spiny West Indian tree | Synonyms: Pisonia aculeata |
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| (noun) widely grown stout Old World hay and pasture grass | Synonyms: cocksfoot, Dactylis glomerata, orchard grass |
| cocksucker | (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, bastard, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
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| (noun) a person who performs fellatio | - |
| cocksureness | (noun) total certainty or greater certainty than circumstances warrant | Synonyms: certitude, overconfidence |
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| cocktail | (noun) a short mixed drink | - |
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| (noun) an appetizer served as a first course at a meal | - |