| acarophobia | (noun) a morbid fear of small insects and mites and worms | - |
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| acousticophobia | (noun) a morbid fear of sounds including your own voice | Synonyms: phonophobia |
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| acrobat | (noun) an athlete who performs acts requiring skill and agility and coordination | - |
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| acrobatic | (adjective) vigorously active | Synonyms: athletic, gymnastic |
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| acrobatics | (noun) the gymnastic moves of an acrobat | Synonyms: tumbling |
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| (noun) the performance of stunts while in flight in an aircraft | Synonyms: aerobatics, stunt flying, stunting |
| acrophobia | (noun) a morbid fear of great heights | - |
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| acrophobic | (adjective) suffering from acrophobia; abnormally afraid of high places | - |
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| adobe | (noun) sun-dried brick; used in hot dry climates | Synonyms: adobe brick |
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| (noun) the clay from which adobe bricks are made | - |
| adobo | (noun) a dish of marinated vegetables and meat or fish; served with rice | - |
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| aerobatics | (noun) the performance of stunts while in flight in an aircraft | Synonyms: acrobatics, stunt flying, stunting |
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| aerobe | (noun) an organism (especially a bacterium) that requires air or free oxygen for life | - |
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| aerobic | (adjective) depending on free oxygen or air | Synonyms: aerophilic, aerophilous |
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| (adjective) based on or using the principles of aerobics; enhancing respiratory and circulatory efficiency | - |
| aerobics | (noun) exercise that increases the need for oxygen | Synonyms: aerobic exercise |
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| aerobiosis | (noun) life sustained in the presence of air or oxygen | - |
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| aerobiotic | (adjective) living or active only in the presence of oxygen | - |
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| agammaglobulinemia | (noun) a rare immunological disorder characterized by the virtual absence of gamma globulin in the blood and consequent susceptibility to infection | - |
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| agoraphobia | (noun) a morbid fear of open spaces (as fear of being caught alone in some public place) | - |
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| agoraphobic | (adjective) suffering from agoraphobia; abnormally afraid of open or public places | - |
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| agrobiologic | (adjective) of or pertaining to agrobiology | Synonyms: agrobiological |
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| agrobiological | (adjective) of or pertaining to agrobiology | Synonyms: agrobiologic |
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| agrobiology | (noun) the study of plant nutrition and growth especially as a way to increase crop yield | - |
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| ailurophobia | (noun) a morbid fear of cats | - |
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| algarobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarroba, algarrobilla |
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| algarroba | (noun) evergreen Mediterranean tree with edible pods; the biblical carob | Synonyms: carob, carob bean tree, carob tree, Ceratonia siliqua |
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| (noun) mesquite of Gulf Coast and Caribbean Islands from Mexico to Venezuela | Synonyms: Prosopis juliflora, Prosopis juliiflora |
| (noun) long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute | Synonyms: algarroba bean, carob, carob bean, locust bean, locust pod |
| (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarrobilla |
| algarrobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarroba |
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| algophobia | (noun) a morbid fear of pain | - |
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| algophobic | (adjective) suffering from algophobia; abnormally afraid of pain | - |
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| ameloblast | (noun) a cell from which tooth enamel develops | - |
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| aminobenzine | (noun) oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines | Synonyms: aniline, aniline oil, phenylamine |
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| ammobium | (noun) any plant of the genus Ammobium having yellow flowers and silvery foliage | - |
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| amobarbital | (noun) a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant | - |
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| anaerobe | (noun) an organism (especially a bacterium) that does not require air or free oxygen to live | - |
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| anaerobic | (adjective) living or active in the absence of free oxygen | Synonyms: anaerobiotic |
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| (adjective) not aerobic | - |
| anaerobiotic | (adjective) living or active in the absence of free oxygen | Synonyms: anaerobic |
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| androphobia | (noun) a morbid fear of men | - |
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| anglophobe | (noun) a person who hates England and everything English | - |
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| antimicrobial | (adjective) capable of destroying or inhibiting the growth of disease-causing microorganisms | Synonyms: antimicrobic |
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| (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobic, disinfectant, germicide |
| antimicrobic | (adjective) capable of destroying or inhibiting the growth of disease-causing microorganisms | Synonyms: antimicrobial |
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| (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobial, disinfectant, germicide |
| approbate | (verb) accept (documents) as valid | - |
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| (verb) approve or sanction officially | - |
| approbation | (noun) official recognition or approval | - |
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| (noun) official approval | - |
| approbative | (adjective) expressing or manifesting praise or approval | Synonyms: affirmative, approbatory, approving, plausive |
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| approbatory | (adjective) expressing or manifesting praise or approval | Synonyms: affirmative, approbative, approving, plausive |
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| aquaphobia | (noun) a morbid fear of drowning | - |
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| aquaphobic | (adjective) abnormally afraid of water | Synonyms: hydrophobic |
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| arachnophobia | (noun) a morbid fear of spiders | - |
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| araroba | (noun) a bitter yellow powder used to treat skin diseases | Synonyms: chrysarobin, Goa powder |
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| archaeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archeobacteria |
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| archeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archaeobacteria |
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| arroba | (noun) a unit of weight used in some Spanish speaking countries | - |
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| (noun) a liquid measure (with different values) used in some Spanish speaking countries | - |
| astraphobia | (noun) a morbid fear of thunder and lightning | - |
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| astrobiology | (noun) the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life | Synonyms: exobiology, space biology |
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| autobahn | (noun) an expressway in a German-speaking country | - |
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| autobiographer | (noun) someone who writes their own biography | - |
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| autobiographic | (adjective) relating to or in the style of an autobiography | Synonyms: autobiographical |
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| (adjective) of or relating to or characteristic of an autobiographer | Synonyms: autobiographical |
| autobiographical | (adjective) relating to or in the style of an autobiography | Synonyms: autobiographic |
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| (adjective) of or relating to or characteristic of an autobiographer | Synonyms: autobiographic |
| autobiography | (noun) a biography of yourself | - |
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| autobus | (noun) a vehicle carrying many passengers; used for public transport | Synonyms: bus, charabanc, coach, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle |
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| automobile | (noun) a motor vehicle with four wheels; usually propelled by an internal combustion engine | Synonyms: auto, car, machine, motorcar |
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| (verb) travel in an automobile | - |
| automobilist | (noun) someone who drives (or travels in) an automobile | Synonyms: motorist |
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| automysophobia | (noun) a morbid fear of being dirty | - |
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| baobab | (noun) African tree having an exceedingly thick trunk and fruit that resembles a gourd and has an edible pulp called monkey bread | Synonyms: Adansonia digitata, monkey-bread tree |
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| bathrobe | (noun) a loose-fitting robe of towelling; worn after a bath or swim | - |
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| bilobate | (adjective) divided into two lobes | Synonyms: bilobated, bilobed |
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| bilobated | (adjective) divided into two lobes | Synonyms: bilobate, bilobed |
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| bilobed | (adjective) divided into two lobes | Synonyms: bilobate, bilobated |
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| blob | (noun) an indistinct shapeless form | - |
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| (verb) make a spot or mark onto | Synonyms: blot, fleck, spot |
| bloodmobile | (noun) a motor vehicle equipped to collect blood donations | - |
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| blowjob | (noun) slang for fellatio | Synonyms: cock sucking |
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| bob | (noun) a short abrupt inclination (as of the head) | - |
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| (noun) a short or shortened tail of certain animals | Synonyms: bobtail, dock |
| (noun) a small float usually made of cork; attached to a fishing line | Synonyms: bobber, bobfloat, cork |
| (noun) a hanging weight, especially a metal ball on a string | - |
| (noun) a long racing sled (for 2 or more people) with a steering mechanism | Synonyms: bobsled, bobsleigh |
| (noun) a hair style for women and children; a short haircut all around | - |
| (noun) a former monetary unit in Great Britain | Synonyms: British shilling, shilling |
| (verb) cut hair in the style of a bob | - |
| (verb) make a curtsy; usually done only by girls and women; as a sign of respect | Synonyms: curtsy |
| (verb) remove or shorten the tail of an animal | Synonyms: dock, tail |
| (verb) move up and down repeatedly in a quick, short movement | - |
| (verb) ride a bobsled | Synonyms: bobsled |
| bobber | (noun) a small float usually made of cork; attached to a fishing line | Synonyms: bob, bobfloat, cork |
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| bobbin | (noun) a winder around which thread or tape or film or other flexible materials can be wound | Synonyms: reel, spool |
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| bobble | (noun) the momentary juggling of a batted or thrown baseball | - |
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| (verb) make a mess of, destroy or ruin | Synonyms: ball up, blow, bodge, bollix, bollix up, bollocks, bollocks up, botch, botch up, bumble, bungle, flub, fluff, foul up, fuck up, fumble, louse up, mess up, mishandle, muck up, muff, screw up, spoil |
| bobby | (noun) an informal term for a British policeman | - |
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| bobbysock | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysocks |
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| bobbysocks | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysock |
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| bobbysoxer | (noun) an adolescent girl wearing bobby socks (common in the 1940s) | Synonyms: bobby-socker |
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| bobcat | (noun) small lynx of North America | Synonyms: bay lynx, Lynx rufus |
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| bobfloat | (noun) a small float usually made of cork; attached to a fishing line | Synonyms: bob, bobber, cork |
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| bobolink | (noun) migratory American songbird | Synonyms: Dolichonyx oryzivorus, reedbird, ricebird |
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| bobsled | (noun) a long racing sled (for 2 or more people) with a steering mechanism | Synonyms: bob, bobsleigh |
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| (noun) formerly two short sleds coupled together | Synonyms: bobsleigh |
| (verb) ride a bobsled | Synonyms: bob |
| bobsledding | (noun) riding on a bobsled | - |
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| bobsleigh | (noun) a long racing sled (for 2 or more people) with a steering mechanism | Synonyms: bob, bobsled |
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| (noun) formerly two short sleds coupled together | Synonyms: bobsled |
| bobtail | (adjective) having a short or shortened tail | Synonyms: bobtailed |
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| (noun) a short or shortened tail of certain animals | Synonyms: bob, dock |
| (noun) large sheepdog with a profuse shaggy bluish-grey-and-white coat and short tail; believed to trace back to the Roman occupation of Britain | Synonyms: Old English sheepdog |
| bobtailed | (adjective) having a short or shortened tail | Synonyms: bobtail |
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| bobwhite | (noun) a popular North American game bird; named for its call | Synonyms: bobwhite quail, partridge |
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| bonobo | (noun) small chimpanzee of swamp forests in Zaire; a threatened species | Synonyms: Pan paniscus, pygmy chimpanzee |
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| boob | (noun) either of two soft fleshy milk-secreting glandular organs on the chest of a woman | Synonyms: bosom, breast, knocker, tit, titty |
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| (noun) an ignorant or foolish person | Synonyms: booby, dope, dumbbell, dummy, pinhead |
| (verb) commit a faux pas or a fault or make a serious mistake | Synonyms: blunder, drop the ball, goof, sin |
| booboisie | (noun) class consisting of all those who are considered boobs | - |
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| booby | (noun) small tropical gannet having a bright bill or bright feet or both | - |
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| (noun) an ignorant or foolish person | Synonyms: boob, dope, dumbbell, dummy, pinhead |
| bookmobile | (noun) a van with shelves of books; serves as a mobile library or bookstore | - |
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| broncobuster | (noun) a person who breaks horses | Synonyms: bronco buster, buster |
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| carob | (noun) powder from the ground seeds and pods of the carob tree; used as a chocolate substitute | Synonyms: carob powder, Saint-John's-bread |
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| (noun) evergreen Mediterranean tree with edible pods; the biblical carob | Synonyms: algarroba, carob bean tree, carob tree, Ceratonia siliqua |
| (noun) long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute | Synonyms: algarroba, algarroba bean, carob bean, locust bean, locust pod |
| cenobite | (noun) a member of a religious order living in common | Synonyms: coenobite |
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| cenobitic | (adjective) of or relating to or befitting cenobites or their practices of communal living | Synonyms: cenobitical, coenobitic, coenobitical |
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| cenobitical | (adjective) of or relating to or befitting cenobites or their practices of communal living | Synonyms: cenobitic, coenobitic, coenobitical |
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| chlorobenzene | (noun) a colorless volatile flammable liquid with an almond odor that is made from chlorine and benzene; used as a solvent and in the production of phenol and DDT and other organic compounds | - |
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| chlorobenzylidenemalononitrile | (noun) a tear gas that is stronger than CN gas but wears off faster; can be deployed by grenades or cluster bombs; can cause skin burns and fatal pulmonary edema | Synonyms: CS gas |
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| chromoblastomycosis | (noun) a fungal infection characterized by itchy warty nodules on the skin | - |
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| chrysarobin | (noun) a bitter yellow powder used to treat skin diseases | Synonyms: araroba, Goa powder |
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| chrysoberyl | (noun) a rare hard yellow green mineral consisting of beryllium aluminate in crystal form; used as a gemstone | - |
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