| achillea | (noun) any of several plants of the genus Achillea native to Europe and having small white flowers in flat-topped flower heads | - |
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| aiguillette | (noun) ornamental tagged cord or braid on the shoulder of a uniform | Synonyms: aglet, aiglet |
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| algarobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarroba, algarrobilla |
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| algarrobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarroba |
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| amoxicillin | (noun) an antibiotic; a semisynthetic oral penicillin (trade names Amoxil and Larotid and Polymox and Trimox and Augmentin) used to treat bacterial infections | Synonyms: Amoxil, Augmentin, Larotid, Polymox, Trimox |
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| ampicillin | (noun) semisynthetic penicillin (trade names Principen and Polycillin and SK-Ampicillin) | Synonyms: Polycillin, Principen, SK-Ampicillin |
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| anthill | (noun) a mound of earth made by ants as they dig their nest | Synonyms: formicary |
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| argillite | (noun) a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages | - |
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| armadillo | (noun) burrowing chiefly nocturnal mammal with body covered with strong horny plates | - |
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| armilla | (noun) (archeology) a bracelet worn around the wrist or arm | - |
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| (noun) a celestial globe consisting of metal hoops; used by early astronomers to determine the positions of stars | Synonyms: armillary sphere |
| artillery | (noun) large but transportable armament | Synonyms: gun, heavy weapon, ordnance |
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| (noun) a means of persuading or arguing | Synonyms: weapon |
| (noun) an army unit that uses big guns | Synonyms: artillery unit |
| artilleryman | (noun) a serviceman in the artillery | Synonyms: cannoneer, gunner, machine gunner |
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| aspergill | (noun) a short-handled device with a globe containing a sponge; used for sprinkling holy water | Synonyms: aspersorium |
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| aspergillosis | (noun) an opportunistic infection by a fungus of the genus Aspergillus; characterized by inflammation and lesions of the ear and other organs | - |
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| (noun) disease especially in agricultural workers caused by inhalation of Aspergillus spores causing lumps in skin and ears and respiratory organs | - |
| (noun) severe respiratory disease of birds that takes the form of an acute rapidly fatal pneumonia in young chickens and turkeys | Synonyms: brooder pneumonia |
| axilla | (noun) the hollow under the arm where it is joined to the shoulder | Synonyms: armpit, axillary cavity, axillary fossa |
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| bacillus | (noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil | Synonyms: B |
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| banderilla | (noun) a decorated dart that is implanted in the neck or shoulders of the bull during a bull fight | - |
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| banderillero | (noun) the bullfighter who implants decorated darts (banderillas) into the neck or shoulders of the bull during a bull fight | - |
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| barilla | (noun) Algerian plant formerly burned to obtain calcium carbonate | Synonyms: Halogeton souda |
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| (noun) bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash | Synonyms: glasswort, kali, kelpwort, Salsola kali, Salsola soda, saltwort |
| bastille | (noun) a jail or prison (especially one that is run in a tyrannical manner) | - |
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| bazillion | (noun) a very large indefinite number (usually hyperbole) | Synonyms: billion, gazillion, jillion, million, trillion, zillion |
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| benzylpenicillin | (noun) the penicillin that constitutes the principal component of many commercial antibiotics | Synonyms: penicillin G |
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| bill | (noun) the entertainment offered at a public presentation | - |
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| (noun) horny projecting mouth of a bird | Synonyms: beak, neb, nib, pecker |
| (noun) a brim that projects to the front to shade the eyes | Synonyms: eyeshade, peak, visor, vizor |
| (noun) a cutting tool with a sharp edge | Synonyms: billhook |
| (noun) a sign posted in a public place as an advertisement | Synonyms: card, notice, placard, poster, posting |
| (noun) an itemized statement of money owed for goods shipped or services rendered | Synonyms: account, invoice |
| (noun) an advertisement (usually printed on a page or in a leaflet) intended for wide distribution | Synonyms: broadsheet, broadside, circular, flier, flyer, handbill, throwaway |
| (noun) a statute in draft before it becomes law | Synonyms: measure |
| (noun) a list of particulars (as a playbill or bill of fare) | - |
| (noun) a piece of paper money (especially one issued by a central bank) | Synonyms: bank bill, bank note, banker's bill, banknote, Federal Reserve note, government note, greenback, note |
| billabong | (noun) a branch of a river made by water flowing from the main stream only when the water level is high | - |
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| (noun) a stagnant pool of water in the bed of a stream that flows intermittently | - |
| billboard | (noun) large outdoor signboard | Synonyms: hoarding |
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| billet | (noun) lodging for military personnel (especially in a private home) | - |
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| (noun) a short personal letter | Synonyms: line, note, short letter |
| billfish | (noun) giant warm-water game fish having a prolonged and rounded toothless upper jaw | - |
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| (noun) elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters | Synonyms: gar, needlefish |
| (noun) primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth | Synonyms: gar, garfish, garpike, Lepisosteus osseus |
| (noun) slender long-beaked fish of temperate Atlantic waters | Synonyms: saury, Scomberesox saurus |
| billfold | (noun) a pocket-size case for holding papers and paper money | Synonyms: notecase, pocketbook, wallet |
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| billhook | (noun) a cutting tool with a sharp edge | Synonyms: bill |
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| billiards | (noun) any of several games played on rectangular cloth-covered table (with cushioned edges) in which long tapering cue sticks are used to propel ivory (or composition) balls | - |
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| billing | (noun) request for payment of a debt | Synonyms: charge |
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| billingsgate | (noun) foul-mouthed or obscene abuse | Synonyms: scurrility |
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| billion | (noun) the number that is represented as a one followed by 9 zeros | Synonyms: 1000000000, one thousand million |
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| (noun) the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen | Synonyms: 1000000000000, one million million |
| (noun) a very large indefinite number (usually hyperbole) | Synonyms: bazillion, gazillion, jillion, million, trillion, zillion |
| billionaire | (noun) a very rich person whose material wealth is valued at more than a billion dollars | - |
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| billionth | (noun) one part in a billion equal parts | Synonyms: one-billionth |
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| (noun) position 1,000,000,000 in a countable series of things | - |
| billow | (noun) a large sea wave | Synonyms: surge |
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| billy | (noun) male goat | Synonyms: billy goat, he-goat |
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| (noun) a short stout club used primarily by policemen | Synonyms: baton, billy club, billystick, nightstick, truncheon |
| billyo | (noun) an unimaginably large amount | Synonyms: all get out, billy-ho, billyoh |
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| billyoh | (noun) an unimaginably large amount | Synonyms: all get out, billy-ho, billyo |
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| billystick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, nightstick, truncheon |
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| bimillenary | (noun) a span of 2000 years | Synonyms: bimillennium |
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| (noun) the 2000th anniversary (or the celebration of it) | Synonyms: bimillennium |
| bimillennium | (noun) a span of 2000 years | Synonyms: bimillenary |
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| (noun) the 2000th anniversary (or the celebration of it) | Synonyms: bimillenary |
| blanquillo | (noun) important marine food fishes | Synonyms: tilefish |
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| bluebill | (noun) diving ducks of North America having a bluish-grey bill | Synonyms: broadbill, scaup, scaup duck |
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| bluegill | (noun) important edible sunfish of eastern and central United States | Synonyms: Lepomis macrochirus |
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| boatbill | (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, broadbill, Cochlearius cochlearius |
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| bougainvillea | (noun) any of several South American ornamental woody vines of the genus Bougainvillea having brilliant red or purple flower bracts; widely grown in warm regions | - |
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| bouillabaisse | (noun) highly seasoned Mediterranean soup or stew made of several kinds of fish and shellfish with tomatoes and onions or leeks and seasoned with saffron and garlic and herbs | - |
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| bouillon | (noun) a clear seasoned broth | - |
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| braille | (noun) a point system of writing in which patterns of raised dots represent letters and numerals | - |
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| brill | (noun) European food fish | Synonyms: Scophthalmus rhombus |
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| brilliance | (noun) a light within the field of vision that is brighter than the brightness to which the eyes are adapted | Synonyms: blaze, glare |
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| (noun) the quality of being magnificent or splendid or grand | Synonyms: grandeur, grandness, magnificence, splendor, splendour |
| (noun) unusual mental ability | Synonyms: genius |
| brilliancy | (noun) a quality that outshines the usual | Synonyms: luster, lustre, splendor, splendour |
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| brilliantine | (noun) a pomade to make the hair manageable and lustrous | - |
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| broadbill | (noun) small birds of the Old World tropics having bright plumage and short wide bills | - |
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| (noun) freshwater duck of the Northern Hemisphere having a broad flat bill | Synonyms: Anas clypeata, shoveler, shoveller |
| (noun) diving ducks of North America having a bluish-grey bill | Synonyms: bluebill, scaup, scaup duck |
| (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, boatbill, Cochlearius cochlearius |
| caimitillo | (noun) tropical American timber tree with dark hard heavy wood and small plumlike purple fruit | Synonyms: Chrysophyllum oliviforme, damson plum, satin leaf, satinleaf |
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| calabazilla | (noun) perennial vine of dry parts of central and southwestern United States and Mexico having small hard mottled green inedible fruit | Synonyms: buffalo gourd, Cucurbita foetidissima, Missouri gourd, prairie gourd, prairie gourd vine, wild pumpkin |
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| camarilla | (noun) a clique (often secret) that seeks power usually through intrigue | Synonyms: cabal, faction, junto |
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| candelilla | (noun) wax-coated shrub of northern Mexico and southwestern United States | Synonyms: Euphorbia antisyphilitica |
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| (noun) wax-coated Mexican shrub related to Euphorbia antisyphilitica | Synonyms: Pedilanthus bracteatus, Pedilanthus pavonis |
| cantillation | (noun) liturgical chanting | - |
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| capercaillie | (noun) large black Old World grouse | Synonyms: capercailzie, horse of the wood, Tetrao urogallus |
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| capillarity | (noun) a phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries | Synonyms: capillary action |
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| capillary | (noun) a tube of small internal diameter; holds liquid by capillary action | Synonyms: capillary tube, capillary tubing |
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| (noun) any of the minute blood vessels connecting arterioles with venules | Synonyms: capillary vessel |
| carillon | (noun) playing a set of bells that are (usually) hung in a tower | Synonyms: bell ringing, carillon playing |
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| (noun) set of bells hung in a bell tower | - |
| carillonneur | (noun) a musician who plays a carillon | - |
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| cascarilla | (noun) West Indian shrub with aromatic bark | Synonyms: Croton eluteria |
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| caterpillar | (noun) a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth | - |
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| caviller | (noun) a disputant who quibbles; someone who raises annoying petty objections | Synonyms: caviler, pettifogger, quibbler |
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| cedilla | (noun) a diacritical mark (,) placed below the letter c to indicate that it is pronounced as an s | - |
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| chenille | (noun) a heavy fabric woven with chenille cord; used in rugs and bedspreads | - |
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| (noun) a soft tufted cord used in embroidery | Synonyms: chenille cord |
| chill | (noun) coldness due to a cold environment | Synonyms: gelidity, iciness |
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| (noun) a sudden numbing dread | Synonyms: pall |
| (noun) an almost pleasurable sensation of fright | Synonyms: frisson, quiver, shiver, shudder, thrill, tingle |
| (noun) a sensation of cold that often marks the start of an infection and the development of a fever | Synonyms: shivering |
| chiller | (noun) excitation that makes your hair stand up or that chills your bones | Synonyms: hair-raiser |
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| chilli | (noun) very hot and finely tapering pepper of special pungency | Synonyms: chile, chili, chili pepper, chilly |
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| chilliness | (noun) the property of being moderately cold | Synonyms: coolness, nip |
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| (noun) a lack of affection or enthusiasm | Synonyms: coldness, coolness, frigidity, frigidness, iciness |
| chilling | (noun) the process of becoming cooler; a falling temperature | Synonyms: cooling, temperature reduction |
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| chilly | (noun) very hot and finely tapering pepper of special pungency | Synonyms: chile, chili, chili pepper, chilli |
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| chinchilla | (noun) small rodent with soft pearly grey fur; native to the Andes but bred in captivity for fur | Synonyms: Chinchilla laniger |
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| (noun) a thick twilled fabric of wool and cotton | - |
| (noun) the expensive silvery grey fur of the chinchilla | - |
| chinchillon | (noun) gregarious burrowing rodent larger than the chinchillas | Synonyms: Lagostomus maximus, viscacha |
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| cigarillo | (noun) small cigar or cigarette wrapped in tobacco instead of paper | - |
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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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| coloradillo | (noun) handsome shrub with showy orange to scarlet or crimson flowers; Florida and West Indies to Mexico and Brazil | Synonyms: Hamelia erecta, Hamelia patens, scarlet bush, scarlet hamelia |
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| coquille | (noun) a dish in the form of a scallop shell | - |
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| (noun) seafood served in a scallop shell | - |
| coronilla | (noun) any of various plants of the genus Coronilla having purple or pink or yellow flowers in long axillary heads or umbels | - |
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| cotillion | (noun) a lively dance originating in France in the 18th century | Synonyms: cotilion |
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| (noun) a ball at which young ladies are presented to society | Synonyms: cotilion |
| councillor | (noun) a member of a council | Synonyms: council member |
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| councillorship | (noun) the position of council member | Synonyms: councilorship |
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| coville | (noun) desert shrub of southwestern United States and New Mexico having persistent resinous aromatic foliage and small yellow flowers | Synonyms: creosote bush, hediondilla, Larrea tridentata |
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| cranesbill | (noun) any of numerous geraniums of the genus Geranium | Synonyms: crane's bill |
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| crossbill | (noun) finch with a bill whose tips cross when closed | Synonyms: Loxia curvirostra |
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| cyrilla | (noun) shrub or small tree of southeastern United States to West Indies and Brazil; grown for the slender racemes of white flowers and orange and crimson foliage | Synonyms: Cyrilla racemiflora, leatherwood, white titi |
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| defibrillation | (noun) treatment by stopping fibrillation of heart muscles (usually by electric shock delivered by a defibrillator) | - |
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| defibrillator | (noun) an electronic device that administers an electric shock of preset voltage to the heart through the chest wall in an attempt to restore the normal rhythm of the heart during ventricular fibrillation | - |
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| deshabille | (noun) the state of being carelessly or partially dressed | Synonyms: dishabille |
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| dicloxacillin | (noun) antibacterial (trade name Dynapen) used to treat staphylococcal infections that are resistant to penicillin | Synonyms: Dynapen |
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| dill | (noun) aromatic threadlike foliage of the dill plant used as seasoning | Synonyms: dill weed |
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| (noun) aromatic Old World herb having aromatic threadlike foliage and seeds used as seasoning | Synonyms: Anethum graveolens |
| dillenia | (noun) any of several evergreen trees or shrubs of the genus Dillenia grown for their foliage and nodding flowers resembling magnolias which are followed by fruit that is used in curries and jellies and preserves | - |
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| dillydallier | (noun) someone who wastes time | Synonyms: dallier, dilly-dallier, lounger, mope |
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| dishabille | (noun) the state of being carelessly or partially dressed | Synonyms: deshabille |
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| disillusion | (noun) freeing from false belief or illusions | Synonyms: disenchantment, disillusionment |
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| disillusionment | (noun) freeing from false belief or illusions | Synonyms: disenchantment, disillusion |
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