| butadiene | (noun) a gaseous hydrocarbon C4H6; used in making synthetic rubbers | - |
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| butane | (noun) occurs in natural gas; used in the manufacture of rubber and fuels | - |
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| butanol | (noun) a flammable alcohol derived from butanes and used for solvents | Synonyms: butyl alcohol |
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| butanone | (noun) colorless soluble flammable liquid ketone used as a solvent for resins and as a paint remover and in lacquers and cements and adhesives and cleaning fluids and celluloid | Synonyms: methyl ethyl ketone |
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| butat | (noun) 100 bututs equal 1 dalasi in Gambia | Synonyms: butut |
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| butch | (noun) a closely cropped haircut; usually for men or boys | Synonyms: crew cut, flattop |
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| (noun) (slang) offensive term for a lesbian who is noticeably masculine | Synonyms: dike, dyke |
| butcher | (noun) a person who slaughters or dresses meat for market | Synonyms: slaughterer |
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| (noun) a brutal indiscriminate murderer | - |
| (noun) a retailer of meat | Synonyms: meatman |
| (noun) someone who makes mistakes because of incompetence | Synonyms: blunderer, botcher, bumbler, bungler, fuckup, fumbler, sad sack, stumbler |
| butcherbird | (noun) shrikes that impale their prey on thorns | - |
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| (noun) large carnivorous Australian bird with the shrike-like habit of impaling prey on thorns | - |
| butchering | (noun) the business of a butcher | Synonyms: butchery |
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| butchery | (noun) the business of a butcher | Synonyms: butchering |
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| (noun) the savage and excessive killing of many people | Synonyms: carnage, mass murder, massacre, slaughter |
| (noun) a building where animals are butchered | Synonyms: abattoir, shambles, slaughterhouse |
| butene | (noun) any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers | Synonyms: butylene |
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| buteonine | (noun) any hawk of the genus Buteo | - |
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| butler | (noun) a manservant (usually the head servant of a household) who has charge of wines and the table | Synonyms: pantryman |
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| butt | (noun) thick end of the handle | Synonyms: butt end |
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| (noun) the small unused part of something (especially the end of a cigarette that is left after smoking) | Synonyms: stub |
| (noun) a large cask (especially one holding a volume equivalent to 2 hogsheads or 126 gallons) | - |
| (noun) sports equipment consisting of an object set up for a marksman or archer to aim at | Synonyms: target |
| (noun) finely ground tobacco wrapped in paper; for smoking | Synonyms: cigaret, cigarette, coffin nail, fag |
| (noun) a joint made by fastening ends together without overlapping | Synonyms: butt joint |
| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
| (noun) a victim of ridicule or pranks | Synonyms: goat, laughingstock, stooge |
| (noun) the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots | - |
| butte | (noun) a hill that rises abruptly from the surrounding region; has a flat top and sloping sides | - |
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| 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 | - |
| butterball | (noun) small North American diving duck; males have bushy head plumage | Synonyms: Bucephela albeola, bufflehead, dipper |
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| (noun) a rotund individual | Synonyms: fat person, fatso, fatty, roly-poly |
| butterbean | (noun) small flat green bean similar to lima beans | Synonyms: butter bean, civet bean, sieva bean |
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| butterbur | (noun) small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas | Synonyms: bog rhubarb, Petasites hybridus, Petasites vulgaris |
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| buttercrunch | (noun) lettuce with delicate and relatively crunchy leaves | - |
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| buttercup | (noun) any of various plants of the genus Ranunculus | Synonyms: butter-flower, butterflower, crowfoot, goldcup, kingcup |
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| butterfat | (noun) the fatty substance of milk from which butter is made | - |
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| butterfingers | (noun) someone who drops things (especially one who cannot catch a ball) | - |
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| butterfish | (noun) small marine fish with a short compressed body and feeble spines | Synonyms: stromateid, stromateid fish |
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| (noun) slippery scaleless food fish of the northern Atlantic coastal waters | Synonyms: Pholis gunnellus, rock gunnel |
| (noun) any of numerous small flat Atlantic food fish having smooth skin | - |
| butterflower | (noun) any of various plants of the genus Ranunculus | Synonyms: butter-flower, buttercup, crowfoot, goldcup, kingcup |
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| butterfly | (noun) a swimming stroke in which the arms are thrown forward together out of the water while the feet kick up and down | Synonyms: butterfly stroke |
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| (noun) diurnal insect typically having a slender body with knobbed antennae and broad colorful wings | - |
| butterflyfish | (noun) tropical fish with huge fanlike pectoral fins for underwater gliding; unrelated to searobins | Synonyms: flying gurnard, flying robin |
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| buttermilk | (noun) residue from making butter from sour raw milk; or pasteurized milk curdled by adding a culture | - |
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| butternut | (noun) oily egg-shaped nut of an American tree of the walnut family | - |
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| (noun) North American walnut tree having light-brown wood and edible nuts; source of a light-brown dye | Synonyms: butternut tree, Juglans cinerea, white walnut |
| butterscotch | (noun) a hard brittle candy made with butter and brown sugar | - |
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| butterweed | (noun) any of several yellow-flowered plants of the genus Packera; often placed in genus Senecio | - |
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| (noun) American ragwort with yellow flowers | Synonyms: ragwort, Senecio glabellus |
| butterwort | (noun) any of numerous carnivorous bog plants of the genus Pinguicula having showy purple or yellow or white flowers and a rosette of basal leaves coated with a sticky secretion to trap small insects | - |
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| buttery | (noun) a teashop where students in British universities can purchase light meals | - |
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| (noun) a small storeroom for storing foods or wines | Synonyms: larder, pantry |
| buttinsky | (noun) a meddler who tends to butt in | - |
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| buttock | (noun) either of the two large fleshy masses of muscular tissue that form the human rump | Synonyms: cheek |
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| buttocks | (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
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| button | (noun) a round fastener sewn to shirts and coats etc to fit through buttonholes | - |
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| (noun) an electrical switch operated by pressing | Synonyms: push, push button |
| (noun) a device that when pressed will release part of a mechanism | Synonyms: release |
| (noun) any artifact that resembles a button | - |
| (noun) a specific area or icon in graphical user interface systems that is clicked or pressed in order to select a command or perform an action | - |
| (noun) a female sexual organ homologous to the penis | Synonyms: clit, clitoris |
| (noun) a round flat badge displaying information and suitable for pinning onto a garment | - |
| (noun) any of various plant parts that resemble buttons | - |
| buttonhole | (noun) a hole through which buttons are pushed | Synonyms: button hole |
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| buttonhook | (noun) a hook for pulling a button through a buttonhole | - |
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| buttonwood | (noun) very large spreading plane tree of eastern and central North America to Mexico | Synonyms: American plane, American sycamore, Platanus occidentalis |
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| buttress | (noun) a support usually of stone or brick; supports the wall of a building | Synonyms: buttressing |
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| buttressing | (noun) a support usually of stone or brick; supports the wall of a building | Synonyms: buttress |
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| butty | (noun) a sandwich | - |
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| butut | (noun) 100 bututs equal 1 dalasi in Gambia | Synonyms: butat |
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| butyl | (noun) a hydrocarbon radical (C4H9) | - |
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| butylene | (noun) any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers | Synonyms: butene |
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| butyrin | (noun) any of three glycerides of butyric acid | - |
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| buxomness | (noun) the bodily property of being attractively plump and vigorous and (of women) full-bosomed | - |
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| buy | (noun) an advantageous purchase | Synonyms: bargain, steal |
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| buyback | (noun) the act of purchasing back something previously sold | Synonyms: redemption, repurchase |
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| buyer | (noun) a person who buys | Synonyms: emptor, purchaser, vendee |
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| buying | (noun) the act of buying | Synonyms: purchasing |
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| buyout | (noun) acquisition of a company by purchasing a controlling percentage of its stock | - |
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| buzz | (noun) a confusion of activity and gossip | - |
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| (noun) sound of rapid vibration | Synonyms: bombilation, bombination |
| buzzard | (noun) a New World vulture that is common in South America and Central America and the southern United States | Synonyms: Cathartes aura, turkey buzzard, turkey vulture |
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| (noun) the common European short-winged hawk | Synonyms: Buteo buteo |
| buzzer | (noun) a push button at an outer door that gives a ringing or buzzing signal when pushed | Synonyms: bell, doorbell |
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| (noun) a signaling device that makes a buzzing sound | - |
| buzzword | (noun) stock phrases that have become nonsense through endless repetition | Synonyms: cant |
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| calabura | (noun) a fast-growing tropical American evergreen having white flowers and fleshy edible fruit; a bark yields a silky fiber used in cordage and wood is valuable for staves | Synonyms: calabur tree, Jamaican cherry, Muntingia calabura, silk wood, silkwood |
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| carbuncle | (noun) an infection larger than a boil and with several openings for discharge of pus | - |
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| (noun) deep-red cabochon garnet cut without facets | - |
| carburetor | (noun) mixes air with gasoline vapor prior to explosion | Synonyms: carburettor |
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| carburettor | (noun) mixes air with gasoline vapor prior to explosion | Synonyms: carburetor |
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| cheeseburger | (noun) a hamburger with melted cheese on it | - |
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| chlorambucil | (noun) an alkylating agent (trade name Leukeran) used to treat some kinds of cancer | Synonyms: Leukeran |
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| clotbur | (noun) any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs | Synonyms: burdock |
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| cloudburst | (noun) a heavy rain | Synonyms: deluge, downpour, pelter, soaker, torrent, waterspout |
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| coachbuilder | (noun) a craftsman who makes the bodies of motor vehicles | - |
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| 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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| colobus | (noun) arboreal monkey of western and central Africa with long silky fur and reduced thumbs | Synonyms: colobus monkey |
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| combustibility | (noun) the quality of being capable of igniting and burning | Synonyms: burnability, combustibleness |
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| combustible | (noun) a substance that can be burned to provide heat or power | Synonyms: combustible material |
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| combustibleness | (noun) the quality of being capable of igniting and burning | Synonyms: burnability, combustibility |
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| combustion | (noun) the act of burning something | Synonyms: burning |
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| (noun) a process in which a substance reacts with oxygen to give heat and light | Synonyms: burning |
| (noun) a state of violent disturbance and excitement | - |
| confabulation | (noun) (psychiatry) a plausible but imagined memory that fills in gaps in what is remembered | - |
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| (noun) an informal conversation | Synonyms: chat, confab, schmoose, schmooze |
| constabulary | (noun) the force of policemen and officers | Synonyms: law, police, police force |
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| contribution | (noun) act of giving in common with others for a common purpose especially to a charity | Synonyms: donation |
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| (noun) a writing for publication especially one of a collection of writings as an article or story | - |
| (noun) the effort contributed by a person in bringing about a result | Synonyms: part, share |
| (noun) a voluntary gift (as of money or service or ideas) made to some worthwhile cause | Synonyms: donation |
| (noun) an amount of money contributed | - |
| contributor | (noun) someone who contributes (or promises to contribute) a sum of money | Synonyms: subscriber |
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| (noun) a writer whose work is published in a newspaper or magazine or as part of a book | - |
| crotonbug | (noun) small light-brown cockroach brought to United States from Europe; a common household pest | Synonyms: Blattella germanica, Croton bug, German cockroach, water bug |
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| cummerbund | (noun) a broad pleated sash worn as formal dress with a tuxedo | - |
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| cumulonimbus | (noun) a dark cloud of great vertical extent charged with electricity; associated with thunderstorms | Synonyms: cumulonimbus cloud, thundercloud |
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| daisybush | (noun) any of various mostly Australian attractively shaped shrubs of the genus Olearia grown for their handsome and sometimes fragrant evergreen foliage and profusion of daisy flowers with white or purple or blue rays | Synonyms: daisy-bush, daisy bush |
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| debugger | (noun) a program that helps in locating and correcting programming errors | - |
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| debunking | (noun) the exposure of falseness or pretensions | Synonyms: repudiation |
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| debut | (noun) the act of beginning something new | Synonyms: entry, first appearance, introduction, launching, unveiling |
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| (noun) the presentation of a debutante in society | - |
| debutante | (noun) a young woman making her debut into society | Synonyms: deb |
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| dibbuk | (noun) (Jewish folklore) a demon that enters the body of a living person and controls that body's behavior | Synonyms: dybbuk |
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| dibucaine | (noun) a local anesthetic that is administered by injection | - |
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| disbursal | (noun) the act of spending or disbursing money | Synonyms: disbursement, outlay, spending |
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| (noun) amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures) | Synonyms: disbursement, expense |
| disbursement | (noun) the act of spending or disbursing money | Synonyms: disbursal, outlay, spending |
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| (noun) amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures) | Synonyms: disbursal, expense |
| disburser | (noun) someone who spends money to purchase goods or services | Synonyms: expender, spender |
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| discombobulation | (noun) a feeling of embarrassment that leaves you confused | Synonyms: confusion |
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| distributary | (noun) a branch of a river that flows away from the main stream and does not rejoin it | - |
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| distributer | (noun) electrical device that distributes voltage to the spark plugs of a gasoline engine in the order of the firing sequence | Synonyms: distributor, electrical distributor |
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| (noun) someone who markets merchandise | Synonyms: distributor |
| distribution | (noun) the act of distributing or spreading or apportioning | - |
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| (noun) the commercial activity of transporting and selling goods from a producer to a consumer | - |
| (noun) the spatial or geographic property of being scattered about over a range, area, or volume | Synonyms: dispersion |
| (noun) (statistics) an arrangement of values of a variable showing their observed or theoretical frequency of occurrence | Synonyms: statistical distribution |
| distributor | (noun) electrical device that distributes voltage to the spark plugs of a gasoline engine in the order of the firing sequence | Synonyms: distributer, electrical distributor |
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| (noun) a company that markets merchandise | - |
| (noun) someone who markets merchandise | Synonyms: distributer |
| (noun) a person with authority to allot or deal out or apportion | Synonyms: allocator |
| doodlebug | (noun) the larva of any of several insects | Synonyms: ant lion, antlion |
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| (noun) a small jet-propelled winged missile that carries a bomb | Synonyms: buzz bomb, flying bomb, robot bomb, V-1 |
| (noun) a small motor vehicle | - |
| dybbuk | (noun) (Jewish folklore) a demon that enters the body of a living person and controls that body's behavior | Synonyms: dibbuk |
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| ebullience | (noun) overflowing with eager enjoyment or approval | Synonyms: enthusiasm, exuberance |
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| ebullition | (noun) an unrestrained expression of emotion | Synonyms: blowup, effusion, gush, outburst |
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| eburnation | (noun) a change that occurs in degenerative joint disease in which bone is converted into a dense smooth substance resembling ivory | - |
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