| aardvark | (noun) nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata | Synonyms: ant bear, anteater, Orycteropus afer |
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| aardwolf | (noun) striped hyena of southeast Africa that feeds chiefly on insects | Synonyms: Proteles cristata |
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| aboard | (adverb) on first or second or third base | - |
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| (adverb) on a ship, train, plane or other vehicle | Synonyms: on board |
| (adverb) part of a group | - |
| (adverb) side by side | Synonyms: alongside |
| aboveboard | (adjective) without concealment or deception; honest | Synonyms: straightforward |
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| (adverb) in an honest manner | Synonyms: honestly |
| absurd | (adjective) so unreasonable as to invite derision | Synonyms: cockeyed, derisory, idiotic, laughable, ludicrous, nonsensical, preposterous, ridiculous |
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| (adjective) inconsistent with reason or logic or common sense | - |
| (noun) a situation in which life seems irrational and meaningless | Synonyms: the absurd |
| absurdity | (noun) a ludicrous folly | Synonyms: fatuity, fatuousness, silliness |
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| (noun) a message whose content is at variance with reason | Synonyms: absurdness, ridiculousness |
| absurdly | (adverb) in an absurd manner or to an absurd degree | - |
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| absurdness | (noun) a message whose content is at variance with reason | Synonyms: absurdity, ridiculousness |
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| acardia | (noun) congenital absence of the heart (as in the development of some monsters) | - |
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| accord | (noun) sympathetic compatibility | - |
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| (noun) concurrence of opinion | Synonyms: accordance, conformity |
| (noun) a written agreement between two states or sovereigns | Synonyms: pact, treaty |
| (noun) harmony of people's opinions or actions or characters | Synonyms: agreement |
| (verb) allow to have | Synonyms: allot, grant |
| (verb) go together | Synonyms: agree, concord, consort, fit in, harmonise, harmonize |
| accordance | (noun) the act of granting rights | Synonyms: accordance of rights |
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| (noun) concurrence of opinion | Synonyms: accord, conformity |
| accordant | (adjective) being in agreement or harmony; often followed by `with' | - |
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| (adjective) in keeping | Synonyms: agreeable, concordant, conformable, consonant |
| according | (adjective) (followed by `to') in agreement with or accordant with | - |
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| (adjective) (followed by `to') as reported or stated by | - |
| accordingly | (adverb) (sentence connectors) because of the reason given | Synonyms: consequently |
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| (adverb) in accordance with | - |
| accordion | (noun) a portable box-shaped free-reed instrument; the reeds are made to vibrate by air from the bellows controlled by the player | Synonyms: squeeze box |
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| accordionist | (noun) a musician who plays the accordion | - |
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| afeard | (adjective) a pronunciation of afraid | Synonyms: afeared |
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| afford | (verb) be able to spare or give up | - |
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| (verb) be the cause or source of | Synonyms: give, yield |
| (verb) afford access to | Synonyms: give, open |
| (verb) have the financial means to do something or buy something | - |
| affordable | (adjective) that you have the financial means for | Synonyms: low-cost, low-priced |
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| afterdamp | (noun) a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine | - |
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| afterdeck | (noun) a deck abaft of midships | - |
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| afterward | (adverb) happening at a time subsequent to a reference time | Synonyms: after, afterwards, later, later on, subsequently |
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| afterwards | (adverb) happening at a time subsequent to a reference time | Synonyms: after, afterward, later, later on, subsequently |
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| airdock | (noun) a large structure at an airport where aircraft can be stored and maintained | Synonyms: hangar, repair shed |
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| airdrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airport, drome |
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| airdrop | (noun) delivery of supplies or equipment or personnel by dropping them by parachute from an aircraft | - |
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| angiocardiogram | (noun) a series of X rays representing the action of the heart and its blood vessels after the injection of a radiopaque substance | - |
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| antbird | (noun) any of various dull-colored South American birds that feeding on ants some following army ant swarms | Synonyms: ant bird |
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| ard | (noun) a simple light plough without a mouldboard. | Synonyms: ard plough, scratch plough |
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| ardeb | (noun) a unit of dry measure used in Egypt | - |
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| ardent | (adjective) glowing or shining like fire | - |
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| (adjective) characterized by strong enthusiasm | Synonyms: warm |
| (adjective) characterized by intense emotion | Synonyms: fervent, fervid, fiery, impassioned, perfervid, torrid |
| ardently | (adverb) in an ardent manner | - |
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| ardor | (noun) intense feeling of love | Synonyms: ardour |
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| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardour, elan, zeal |
| (noun) feelings of great warmth and intensity | Synonyms: ardour, fervency, fervidness, fervor, fervour, fire |
| ardour | (noun) intense feeling of love | Synonyms: ardor |
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| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardor, elan, zeal |
| (noun) feelings of great warmth and intensity | Synonyms: ardor, fervency, fervidness, fervor, fervour, fire |
| arduous | (adjective) difficult to accomplish; demanding considerable mental effort and skill | - |
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| (adjective) characterized by effort to the point of exhaustion; especially physical effort | Synonyms: backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome |
| (adjective) taxing to the utmost; testing powers of endurance | Synonyms: straining, strenuous |
| arduously | (adverb) in an arduous manner | - |
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| arduousness | (noun) extreme effortfulness | Synonyms: strenuousness |
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| armguard | (noun) a protective covering for the wrist or arm that is used in archery and fencing and other sports | Synonyms: bracer |
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| avoirdupois | (noun) excess bodily weight | Synonyms: blubber, fat, fatness |
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| (noun) a system of weights based on the 16-ounce pound (or 7,000 grains) | Synonyms: avoirdupois weight |
| award | (noun) a grant made by a law court | Synonyms: awarding |
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| (noun) a tangible symbol signifying approval or distinction | Synonyms: accolade, honor, honour, laurels |
| (noun) something given for victory or superiority in a contest or competition or for winning a lottery | Synonyms: prize |
| (verb) give, especially as an honor or reward | Synonyms: present |
| (verb) give as judged due or on the basis of merit | Synonyms: grant |
| awarding | (noun) a grant made by a law court | Synonyms: award |
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| awkward | (adjective) lacking grace or skill in manner or movement or performance | - |
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| (adjective) hard to deal with; especially causing pain or embarrassment | Synonyms: embarrassing, sticky, unenviable |
| (adjective) causing inconvenience | - |
| (adjective) not elegant or graceful in expression | Synonyms: clumsy, cumbersome, ill-chosen, inapt, inept |
| (adjective) socially uncomfortable; unsure and constrained in manner | Synonyms: ill at ease, uneasy |
| (adjective) difficult to handle or manage especially because of shape | Synonyms: bunglesome, clumsy, ungainly |
| awkwardly | (adverb) in an awkward manner | - |
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| awkwardness | (noun) the carriage of someone whose movements and posture are ungainly or inelegant | Synonyms: clumsiness |
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| (noun) the quality of an embarrassing situation | Synonyms: nuisance value |
| (noun) trouble in carrying or managing caused by bulk or shape | Synonyms: cumbersomeness, unwieldiness |
| (noun) the inelegance of someone stiff and unrelaxed (as by embarrassment) | Synonyms: clumsiness, gracelessness, stiffness |
| (noun) unskillfulness resulting from a lack of training | Synonyms: clumsiness, ineptitude, ineptness, maladroitness, slowness |
| backboard | (noun) a board used to support the back of someone or something | - |
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| (noun) a raised vertical board with basket attached; used to play basketball | Synonyms: basketball backboard |
| backsword | (noun) a sword with only one cutting edge | - |
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| (noun) a stick used instead of a sword for fencing | Synonyms: fencing stick, singlestick |
| backward | (adjective) directed or facing toward the back or rear | - |
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| (adjective) (used of temperament or behavior) marked by a retiring nature | - |
| (adjective) retarded in intellectual development | Synonyms: feebleminded, half-witted, slow-witted |
| (adjective) having made less than normal progress | - |
| (adverb) in a manner or order or direction the reverse of normal | Synonyms: backwards |
| (adverb) in or to or toward a past time | Synonyms: back |
| (adverb) at or to or toward the back or rear | Synonyms: back, backwards, rearward, rearwards |
| backwardation | (noun) the market condition wherein the price of a forward or futures contract is trading below the expected spot price at contract maturity. | - |
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| backwardness | (noun) lack of normal development of intellectual capacities | Synonyms: mental retardation, retardation, slowness, subnormality |
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| backwards | (adverb) in a manner or order or direction the reverse of normal | Synonyms: backward |
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| (adverb) at or to or toward the back or rear | Synonyms: back, backward, rearward, rearwards |
| backyard | (noun) the grounds in back of a house | - |
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| balderdash | (noun) trivial nonsense | Synonyms: fiddle-faddle, piffle |
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| ballistocardiogram | (noun) a graphical recording made by a ballistocardiograph | - |
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| ballistocardiograph | (noun) a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles | Synonyms: cardiograph |
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| bard | (noun) an ornamental caparison for a horse | - |
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| (noun) a lyric poet | - |
| (verb) put a caparison on | Synonyms: barde, caparison, dress up |
| barde | (verb) put a caparison on | Synonyms: bard, caparison, dress up |
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| bardic | (adjective) being a bard or relating to a bard's poetry | - |
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| bardolatry | (noun) the idolization of William Shakespeare | - |
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| barnyard | (noun) a yard adjoining a barn | - |
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| baseboard | (noun) a molding covering the joint formed by a wall and the floor | Synonyms: mopboard, skirting board |
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| bastard | (adjective) fraudulent; having a misleading appearance | Synonyms: bogus, fake, phoney, phony |
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| (noun) derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin | Synonyms: mongrel |
| (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, cocksucker, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
| (noun) the illegitimate offspring of unmarried parents | Synonyms: by-blow, illegitimate, illegitimate child, love child, whoreson |
| bastardisation | (noun) an act that debases or corrupts | Synonyms: bastardization |
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| bastardise | (verb) declare a child to be illegitimate | Synonyms: bastardize |
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| (verb) change something so that its value declines; for example, art forms | Synonyms: bastardize |
| bastardised | (adjective) deriving from more than one source or style | Synonyms: bastardized |
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| bastardization | (noun) an act that debases or corrupts | Synonyms: bastardisation |
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| (noun) declaring or rendering bastard | - |
| bastardize | (verb) declare a child to be illegitimate | Synonyms: bastardise |
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| (verb) change something so that its value declines; for example, art forms | Synonyms: bastardise |
| bastardized | (adjective) deriving from more than one source or style | Synonyms: bastardised |
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| bastardly | (adjective) of no value or worth | Synonyms: mean |
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| (adjective) born out of wedlock | Synonyms: misbegot, misbegotten, spurious |
| bastardy | (noun) the status of being born to parents who were not married | Synonyms: bar sinister, illegitimacy |
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| beard | (noun) tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface | Synonyms: byssus |
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| (noun) hairy growth on or near the face of certain mammals | - |
| (noun) the hair growing on the lower part of a man's face | Synonyms: face fungus, whiskers |
| (noun) a person who diverts suspicion from someone (especially a woman who accompanies a male homosexual in order to conceal his homosexuality) | - |
| (noun) a tuft or growth of hairs or bristles on certain plants such as iris or grasses | - |
| (verb) go along the rim, like a beard around the chin | - |
| bearded | (adjective) having a growth of hairlike awns | - |
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| (adjective) having hair on the cheeks and chin | Synonyms: barbate, bewhiskered, whiskered, whiskery |
| beardedness | (noun) The quality of having a beard. | - |
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| beardless | (adjective) lacking hair on the face | Synonyms: smooth-faced |
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| (adjective) having no beard | Synonyms: whiskerless |
| beardown | (adjective) with full strength | - |
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| bellbird | (noun) any of several tropical American birds of the genus Procnias having a bell-like call | - |
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| billboard | (noun) large outdoor signboard | Synonyms: hoarding |
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| billiard | (adjective) of or relating to billiards | - |
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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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| biohazard | (noun) any bacterium or virus or toxin that could be used in biological warfare | Synonyms: biological agent |
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| (noun) hazard to humans or the environment resulting from biological agents or conditions | - |
| bird | (noun) warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings | - |
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| (noun) badminton equipment consisting of a ball of cork or rubber with a crown of feathers | Synonyms: birdie, shuttle, shuttlecock |
| (noun) a cry or noise made to express displeasure or contempt | Synonyms: boo, Bronx cheer, hiss, hoot, raspberry, razz, razzing, snort |
| (noun) the flesh of a bird or fowl (wild or domestic) used as food | Synonyms: fowl |
| (noun) informal terms for a (young) woman | Synonyms: chick, dame, doll, skirt, wench |
| (verb) watch and study birds in their natural habitat | Synonyms: birdwatch |
| birdbath | (noun) an ornamental basin (usually in a garden) for birds to bathe in | - |
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| birdbrain | (noun) a person with confused ideas; incapable of serious thought | Synonyms: addle-head, addlehead, loon |
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| birdcage | (noun) a cage in which a bird can be kept | - |
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| birdcall | (noun) a device for imitating a birdcall | - |
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| (noun) the characteristic sound produced by a bird | Synonyms: birdsong, call, song |
| birder | (noun) a person who identifies and studies birds in their natural habitats | Synonyms: bird watcher |
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| birdfeeder | (noun) an outdoor device that supplies food for wild birds | Synonyms: bird feeder, feeder |
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| birdhouse | (noun) a shelter for birds | - |
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| birdie | (noun) badminton equipment consisting of a ball of cork or rubber with a crown of feathers | Synonyms: bird, shuttle, shuttlecock |
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| (noun) (golf) a score of one stroke under par on a hole | - |
| (verb) shoot in one stroke under par | - |
| birdlime | (noun) a sticky adhesive that is smeared on small branches to capture small birds | Synonyms: lime |
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| (verb) spread birdlime on branches to catch birds | Synonyms: lime |
| birdnest | (noun) nest where birds lay their eggs and hatch their young | Synonyms: bird's nest, bird nest |
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| (verb) gather birdnests | Synonyms: bird-nest |
| birdnesting | (noun) hunting for birds' nests to get the eggs | - |
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| birdseed | (noun) food given to birds; usually mixed seeds | Synonyms: bird feed, bird food |
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| birdsong | (noun) the characteristic sound produced by a bird | Synonyms: birdcall, call, song |
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| birdwatch | (verb) watch and study birds in their natural habitat | Synonyms: bird |
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| blackbird | (noun) any bird of the family Icteridae whose male is black or predominantly black | Synonyms: New World blackbird |
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| (noun) common black European thrush | Synonyms: European blackbird, merl, merle, ousel, ouzel, Turdus merula |
| blackboard | (noun) sheet of slate; for writing with chalk | Synonyms: chalkboard |
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| blackguard | (noun) someone who is morally reprehensible | Synonyms: bounder, cad, dog, heel, hound |
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| (verb) use foul or abusive language towards | Synonyms: abuse, clapperclaw, shout |
| (verb) subject to laughter or ridicule | Synonyms: guy, jest at, laugh at, make fun, poke fun, rib, ridicule, roast |
| blackguardly | (adjective) lacking principles or scruples | Synonyms: rascally, roguish, scoundrelly |
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| blizzard | (noun) a series of unexpected and unpleasant occurrences | Synonyms: rash |
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| (noun) a storm with widespread snowfall accompanied by strong winds | Synonyms: snowstorm |
| bloodcurdling | (adjective) extremely alarming | Synonyms: hair-raising, nightmarish |
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