| flabbergasted | (adjective) as if struck dumb with astonishment and surprise | Synonyms: dumbfounded, dumbstricken, dumbstruck, dumfounded, stupefied, thunderstruck |
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| flabby | (adjective) out of condition; not strong or robust; incapable of exertion or endurance | Synonyms: flaccid, soft |
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| flaccid | (adjective) drooping without elasticity; wanting in stiffness | - |
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| (adjective) out of condition; not strong or robust; incapable of exertion or endurance | Synonyms: flabby, soft |
| flagellate | (adjective) having or resembling a lash or whip (as does a flagellum) | Synonyms: flagellated, lash-like, whiplike |
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| flagellated | (adjective) having or resembling a lash or whip (as does a flagellum) | Synonyms: flagellate, lash-like, whiplike |
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| flagging | (adjective) weak from exhaustion | Synonyms: drooping |
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| flagitious | (adjective) shockingly brutal or cruel | Synonyms: atrocious, grievous, monstrous |
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| (adjective) extremely wicked, deeply criminal | Synonyms: heinous |
| flagrant | (adjective) conspicuously and outrageously bad or reprehensible | Synonyms: crying, egregious, glaring, gross, rank |
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| flakey | (adjective) made of or resembling flakes | Synonyms: flaky |
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| (adjective) made of or easily forming flakes | Synonyms: flaky |
| (adjective) conspicuously or grossly unconventional or unusual | Synonyms: bizarre, eccentric, flaky, freakish, freaky, gonzo, off-the-wall, outlandish, outre |
| flaky | (adjective) made of or resembling flakes | Synonyms: flakey |
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| (adjective) made of or easily forming flakes | Synonyms: flakey |
| (adjective) conspicuously or grossly unconventional or unusual | Synonyms: bizarre, eccentric, flakey, freakish, freaky, gonzo, off-the-wall, outlandish, outre |
| flamboyant | (adjective) elaborately or excessively ornamented | Synonyms: aureate, florid |
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| (adjective) marked by ostentation but often tasteless | Synonyms: showy, splashy |
| flameproof | (adjective) resistant to catching fire | Synonyms: flame-retardant |
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| flaming | (adjective) passionate or quick-tempered | Synonyms: fiery |
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| (adjective) informal intensifiers | Synonyms: bally, blinking, bloody, blooming, crashing, fucking |
| flammable | (adjective) easily ignited | Synonyms: inflammable |
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| flappy | (adjective) having a tendency to flap | - |
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| flaring | (adjective) streaming or flapping or spreading wide as if in a current of air | Synonyms: aflare |
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| flash | (adjective) tastelessly showy | Synonyms: brassy, cheap, flashy, garish, gaudy, gimcrack, loud, meretricious, tacky, tatty, tawdry, trashy |
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| flashy | (adjective) (used especially of clothes) marked by conspicuous display | Synonyms: gaudy, jazzy, showy, sporty |
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| (adjective) tastelessly showy | Synonyms: brassy, cheap, flash, garish, gaudy, gimcrack, loud, meretricious, tacky, tatty, tawdry, trashy |
| flat | (adjective) (of a musical note) lowered in pitch by one chromatic semitone | - |
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| (adjective) lacking contrast or shading between tones | - |
| (adjective) not reflecting light; not glossy | Synonyms: mat, matt, matte, matted |
| (adjective) having a surface without slope, tilt in which no part is higher or lower than another | Synonyms: level, plane |
| (adjective) horizontally level | - |
| (adjective) commercially inactive | - |
| (adjective) lacking the expected range or depth; not designed to give an illusion or depth | Synonyms: 2-dimensional, two-dimensional |
| (adjective) having lost effervescence | - |
| (adjective) having a relatively broad surface in relation to depth or thickness | - |
| (adjective) lacking taste or flavor or tang | Synonyms: bland, flavorless, flavourless, insipid, savorless, savourless, vapid |
| (adjective) flattened laterally along the whole length (e.g., certain leafstalks or flatfishes) | Synonyms: compressed |
| (adjective) stretched out and lying at full length along the ground | Synonyms: prostrate |
| (adjective) sounded or spoken in a tone unvarying in pitch | Synonyms: monotone, monotonic, monotonous |
| (adjective) not modified or restricted by reservations | Synonyms: categoric, categorical, unconditional |
| (adjective) lacking stimulating characteristics; uninteresting | Synonyms: bland |
| flatbottom | (adjective) having a flat bottom | Synonyms: flat-bottom, flat-bottomed, flatbottomed |
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| flatbottomed | (adjective) having a flat bottom | Synonyms: flat-bottom, flat-bottomed, flatbottom |
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| flatfooted | (adjective) forthright and explicit | Synonyms: flat-footed |
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| (adjective) with feet flat on the ground; not tiptoe | Synonyms: flat-footed |
| (adjective) having broad flat feet that usually turn outward | Synonyms: flat-footed |
| (adjective) unprepared and unable to react quickly | Synonyms: flat-footed |
| flattened | (adjective) having been flattened | Synonyms: planate |
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| flattering | (adjective) showing or representing to advantage | - |
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| (adjective) obsequiously complimentary | Synonyms: adulatory |
| flatulent | (adjective) generating excessive gas in the alimentary canal | - |
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| (adjective) suffering from excessive gas in the alimentary canal | Synonyms: colicky, gassy |
| flaunty | (adjective) inclined to flaunt | - |
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| flavorful | (adjective) full of flavor | Synonyms: flavorous, flavorsome, flavourful, flavourous, flavoursome, sapid, saporous |
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| flavorless | (adjective) lacking taste or flavor or tang | Synonyms: bland, flat, flavourless, insipid, savorless, savourless, vapid |
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| flavorous | (adjective) full of flavor | Synonyms: flavorful, flavorsome, flavourful, flavourous, flavoursome, sapid, saporous |
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| flavorsome | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavourful, flavourous, flavoursome, sapid, saporous |
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| flavourful | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavorsome, flavourous, flavoursome, sapid, saporous |
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| flavourless | (adjective) lacking taste or flavor or tang | Synonyms: bland, flat, flavorless, insipid, savorless, savourless, vapid |
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| flavourous | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavorsome, flavourful, flavoursome, sapid, saporous |
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| flavoursome | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavorsome, flavourful, flavourous, sapid, saporous |
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| flawed | (adjective) having a blemish or flaw | Synonyms: blemished |
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| flawless | (adjective) without a flaw | Synonyms: unflawed |
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| flaxen | (adjective) of hair color; pale yellowish to yellowish brown | Synonyms: sandy |
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| flecked | (adjective) having a pattern of dots | Synonyms: dotted, specked, speckled, stippled |
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| fledged | (adjective) (of birds) having developed feathers or plumage; often used in combination | Synonyms: mature |
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| (adjective) (of an arrow) equipped with feathers | Synonyms: vaned |
| fledgeless | (adjective) (of an arrow) not equipped with feathers | Synonyms: unfledged, unvaned |
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| fledgeling | (adjective) (of a young bird) having acquired its flight feathers | Synonyms: fledgling |
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| fledgling | (adjective) (of a young bird) having acquired its flight feathers | Synonyms: fledgeling |
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| (adjective) young and inexperienced | Synonyms: callow, unfledged |
| fleeceable | (adjective) naive and easily deceived or tricked | Synonyms: green, gullible |
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| fleecy | (adjective) (of fabrics) having soft nap produced by brushing | Synonyms: brushed, napped |
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| fleet | (adjective) moving very fast | Synonyms: swift |
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| fleeting | (adjective) lasting for a markedly brief time | Synonyms: fugitive, momentaneous, momentary |
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| fleshly | (adjective) marked by the appetites and passions of the body | Synonyms: animal, carnal, sensual |
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| fleshy | (adjective) of or relating to or resembling flesh | Synonyms: sarcoid |
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| (adjective) usually describes a large person who is fat but has a large frame to carry it | Synonyms: heavy, overweight |
| flexible | (adjective) able to flex; able to bend easily | Synonyms: flexile |
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| (adjective) capable of being changed | - |
| (adjective) making or willing to make concessions | Synonyms: compromising, conciliatory |
| (adjective) able to adjust readily to different conditions | Synonyms: elastic, pliable, pliant |
| (adjective) bending and snapping back readily without breaking | Synonyms: whippy |
| flexile | (adjective) able to flex; able to bend easily | Synonyms: flexible |
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| flexuous | (adjective) having turns or windings | - |
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| flickering | (adjective) shining unsteadily | Synonyms: aflicker |
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| flighted | (adjective) having feathers | - |
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| flightless | (adjective) incapable of flying | - |
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| flighty | (adjective) unpredictably excitable (especially of horses) | Synonyms: nervous, skittish, spooky |
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| (adjective) guided by whim and fancy | Synonyms: flyaway, head-in-the-clouds, scatterbrained |
| flimsy | (adjective) not convincing | Synonyms: unconvincing |
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| (adjective) lacking solidity or strength | Synonyms: insubstantial |
| (adjective) lacking substance or significance | Synonyms: fragile, slight, tenuous, thin |
| flint | (adjective) showing unfeeling resistance to tender feelings | Synonyms: flinty, granitic, obdurate, stony |
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| flinty | (adjective) containing flint | - |
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| (adjective) showing unfeeling resistance to tender feelings | Synonyms: flint, granitic, obdurate, stony |
| flip | (adjective) marked by casual disrespect | Synonyms: impudent, insolent, snotty-nosed |
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| flippant | (adjective) showing inappropriate levity | Synonyms: light-minded |
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| flirtatious | (adjective) like a coquette | Synonyms: coquettish |
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| floating | (adjective) borne up by or suspended in a liquid | - |
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| (adjective) inclined to move or be moved about | - |
| (adjective) not definitely committed to a party or policy | - |
| (adjective) (of a part of the body) not firmly connected; movable or out of normal position | - |
| (adjective) continually changing especially as from one abode or occupation to another | Synonyms: aimless, drifting, vagabond, vagrant |
| floaty | (adjective) tending to float on a liquid or rise in air or gas | Synonyms: buoyant |
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| floccose | (adjective) (of plants) having tufts of soft woolly hairs | - |
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| flocculent | (adjective) having a fluffy character or appearance | Synonyms: woolly, wooly |
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| flooded | (adjective) covered with water | Synonyms: afloat, awash, inundated, overflowing |
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| floodlighted | (adjective) illuminated by means of floodlights | Synonyms: floodlit |
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| floodlit | (adjective) illuminated by means of floodlights | Synonyms: floodlighted |
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| floored | (adjective) provided with a floor | - |
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| floppy | (adjective) hanging limply | - |
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| floral | (adjective) of or relating to the plant life in a particular region | - |
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| (adjective) relating to or associated with flowers | - |
| (adjective) resembling or made of or suggestive of flowers | Synonyms: flowered |
| floricultural | (adjective) of or relating to or involving floriculture | - |
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| florid | (adjective) elaborately or excessively ornamented | Synonyms: aureate, flamboyant |
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| (adjective) inclined to a healthy reddish color often associated with outdoor life | Synonyms: rubicund, ruddy, sanguine |
| flossy | (adjective) like down or as soft as down | Synonyms: downlike, downy, fluffy |
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| flourishing | (adjective) very lively and profitable | Synonyms: booming, burgeoning, palmy, prospering, prosperous, roaring, thriving |
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| floury | (adjective) resembling flour in fine powdery texture | - |
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| flowered | (adjective) resembling or made of or suggestive of flowers | Synonyms: floral |
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| flowering | (adjective) when a plant is in a state of possessing one or multiple flowers and/or blooms | - |
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| flowerless | (adjective) without flower or bloom and not producing seeds | Synonyms: nonflowering |
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| flowery | (adjective) of or relating to or suggestive of flowers | - |
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| (adjective) marked by elaborate rhetoric and elaborated with decorative details | Synonyms: ornate |
| flowing | (adjective) designed or arranged to offer the least resistance to fluid flow | Synonyms: aerodynamic, sleek, streamlined |
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| fluctuating | (adjective) having unpredictable ups and downs | - |
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| fluent | (adjective) expressing yourself readily, clearly, effectively | Synonyms: eloquent, facile, silver-tongued, silver, smooth-spoken |
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| (adjective) smooth and unconstrained in movement | Synonyms: fluid, liquid, smooth |
| fluffy | (adjective) like down or as soft as down | Synonyms: downlike, downy, flossy |
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| fluid | (adjective) subject to change; variable | Synonyms: unstable |
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| (adjective) in cash or easily convertible to cash | Synonyms: liquid |
| (adjective) smooth and unconstrained in movement | Synonyms: fluent, liquid, smooth |
| (adjective) characteristic of a fluid; capable of flowing and easily changing shape | Synonyms: runny |
| (adjective) affording change (especially in social status) | Synonyms: mobile |
| flukey | (adjective) subject to accident or chance or change | Synonyms: chancy, fluky, iffy |
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| fluky | (adjective) subject to accident or chance or change | Synonyms: chancy, flukey, iffy |
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| fluorescent | (adjective) brilliantly colored and apparently giving off light | - |
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| (adjective) emitting light during exposure to radiation from an external source | - |
| flush | (adjective) of a surface exactly even with an adjoining one, forming the same plane | - |
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| (adjective) having an abundant supply of money or possessions of value | Synonyms: affluent, loaded, moneyed, substantial, wealthy |
| flushed | (adjective) (especially of the face) reddened or suffused with or as if with blood from emotion or exertion | Synonyms: crimson, red-faced, red, reddened |
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| (adjective) having the pinkish flush of health | Synonyms: rose-cheeked, rosy-cheeked, rosy |
| flustered | (adjective) thrown into a state of agitated confusion; (`rattled' is an informal term) | Synonyms: hot and bothered, perturbed, rattled |
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| fluvial | (adjective) of or relating to or happening in a river | - |
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| fly | (adjective) (British informal) not to be deceived or hoodwinked | - |
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| flyaway | (adjective) guided by whim and fancy | Synonyms: flighty, head-in-the-clouds, scatterbrained |
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| (adjective) (of hair or clothing) worn loose | - |
| flyblown | (adjective) blemished, especially of reputation | - |
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| (adjective) foul and run-down and repulsive | Synonyms: sordid, squalid |
| (adjective) spoiled and covered with eggs and larvae of flies | Synonyms: maggoty |
| flying | (adjective) hurried and brief | Synonyms: fast, quick |
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| (adjective) moving swiftly | Synonyms: fast-flying |
| flyspeck | (adjective) very small | Synonyms: bantam, diminutive, lilliputian, midget, petite, tiny |
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