| flambeau | (noun) a flaming torch (such as are used in processions at night) | - |
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| flamboyance | (noun) extravagant elaborateness | Synonyms: floridity, floridness, showiness |
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| flamboyant | (noun) showy tropical tree or shrub native to Madagascar; widely planted in tropical regions for its immense racemes of scarlet and orange flowers; sometimes placed in genus Poinciana | Synonyms: Delonix regia, flame tree, peacock flower, Poinciana regia, royal poinciana |
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| flame | (noun) the process of combustion of inflammable materials producing heat and light and (often) smoke | Synonyms: fire, flaming |
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| flamefish | (noun) a cardinalfish found in tropical Atlantic coastal waters | Synonyms: Apogon maculatus, flame fish |
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| flameflower | (noun) plant with fleshy roots and erect stems with narrow succulent leaves and one reddish-orange flower in each upper leaf axil; southwestern United States; Indians once cooked the fleshy roots | Synonyms: flame-flower, flame flower, Talinum aurantiacum |
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| (noun) a plant of the genus Kniphofia having long grasslike leaves and tall scapes of red or yellow drooping flowers | Synonyms: flame-flower, flame flower, kniphofia, tritoma |
| flamen | (noun) a priest who served a particular deity in ancient Rome | - |
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| flamenco | (noun) a style of dancing characteristic of the Andalusian Gypsies; vigorous and rhythmic with clapping and stamping of feet | Synonyms: gypsy dancing |
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| (noun) guitar music composed for dancing the flamenco | - |
| flamethrower | (noun) a weapon that squirts ignited fuel for several yards | - |
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| flaming | (noun) the process of combustion of inflammable materials producing heat and light and (often) smoke | Synonyms: fire, flame |
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| flamingo | (noun) large pink to scarlet web-footed wading bird with down-bent bill; inhabits brackish lakes | - |
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| flammability | (noun) the quality of being easily ignited and burning rapidly | Synonyms: inflammability |
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| flan | (noun) open pastry filled with fruit or custard | - |
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| flange | (noun) a projection used for strength or for attaching to another object | Synonyms: rim |
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| flank | (noun) the side between ribs and hipbone | - |
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| (noun) a cut from the fleshy part of an animal's side between the ribs and the leg | - |
| (noun) the side of military or naval formation | Synonyms: wing |
| (noun) a subfigure consisting of a side of something | - |
| flanker | (noun) a soldier who is a member of a detachment assigned to guard the flanks of a military formation | - |
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| (noun) a back stationed wide of the scrimmage line; used as a pass receiver | Synonyms: flanker back |
| flannel | (noun) a soft light woolen fabric; used for clothing | - |
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| (noun) bath linen consisting of a piece of cloth used to wash the face and body | Synonyms: face cloth, washcloth, washrag |
| (noun) (usually in the plural) trousers made of flannel or gabardine or tweed or white cloth | Synonyms: gabardine, tweed, white |
| flannelbush | (noun) any of several handsome evergreen shrubs of California and northern Mexico having downy lobed leaves and showy yellow flowers | Synonyms: California beauty, flannel bush |
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| flannelette | (noun) a cotton fabric imitating flannel | - |
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| flap | (noun) any broad thin and limber covering attached at one edge; hangs loose or projects freely | - |
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| (noun) a movable airfoil that is part of an aircraft wing; used to increase lift or drag | Synonyms: flaps |
| (noun) a movable piece of tissue partly connected to the body | - |
| (noun) the motion made by flapping up and down | Synonyms: flapping, flutter, fluttering |
| (noun) an excited state of agitation | Synonyms: dither, fuss, pother, tizzy |
| flapcake | (noun) a flat cake of thin batter fried on both sides on a griddle | Synonyms: battercake, flannel-cake, flannel cake, flapjack, griddlecake, hot cake, hotcake, pancake |
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| flapjack | (noun) a flat cake of thin batter fried on both sides on a griddle | Synonyms: battercake, flannel-cake, flannel cake, flapcake, griddlecake, hot cake, hotcake, pancake |
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| flapper | (noun) a young woman in the 1920s who flaunted her unconventional conduct and dress | - |
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| flapping | (noun) the motion made by flapping up and down | Synonyms: flap, flutter, fluttering |
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| flaps | (noun) a movable airfoil that is part of an aircraft wing; used to increase lift or drag | Synonyms: flap |
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| flare | (noun) (baseball) a fly ball hit a short distance into the outfield | - |
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| (noun) a short forward pass to a back who is running toward the sidelines | Synonyms: flare pass |
| (noun) a device that produces a bright light for warning or illumination or identification | - |
| (noun) a burst of light used to communicate or illuminate | Synonyms: flash |
| (noun) a sudden outburst of emotion | - |
| (noun) a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference | Synonyms: solar flare |
| (noun) an unwanted reflection in an optical system (or the fogging of an image that is caused by such a reflection) | - |
| (noun) a sudden burst of flame | - |
| (noun) a shape that spreads outward | Synonyms: flair |
| (noun) reddening of the skin spreading outward from a focus of infection or irritation | - |
| (noun) a sudden recurrence or worsening of symptoms | - |
| flash | (noun) a lamp for providing momentary light to take a photograph | Synonyms: flash bulb, flash lamp, flashbulb, flashgun, photoflash |
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| (noun) a bright patch of color used for decoration or identification | - |
| (noun) a momentary brightness | - |
| (noun) a sudden brilliant understanding | - |
| (noun) a short news announcement concerning some on-going news story | Synonyms: news bulletin, newsbreak, newsflash |
| (noun) a burst of light used to communicate or illuminate | Synonyms: flare |
| (noun) a gaudy outward display | Synonyms: fanfare, ostentation |
| (noun) a sudden intense burst of radiant energy | - |
| (noun) a short vivid experience | Synonyms: flashing |
| (noun) a very short time (as the time it takes the eye to blink or the heart to beat) | Synonyms: blink of an eye, heartbeat, instant, jiffy, New York minute, split second, trice, twinkling, wink |
| flashback | (noun) a transition (in literary or theatrical works or films) to an earlier event or scene that interrupts the normal chronological development of the story | - |
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| (noun) an unexpected but vivid recurrence of a past experience (especially a recurrence of the effects of an hallucinogenic drug taken much earlier) | - |
| flashboard | (noun) boarding place along the top of a dam to increase its height | Synonyms: flashboarding |
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| flashboarding | (noun) boarding place along the top of a dam to increase its height | Synonyms: flashboard |
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| flashbulb | (noun) a lamp for providing momentary light to take a photograph | Synonyms: flash, flash bulb, flash lamp, flashgun, photoflash |
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| flashcard | (noun) a card with words or numbers or pictures that is flashed to a class by the teacher | Synonyms: flash card |
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| flasher | (noun) an electrical device that automatically turns a lamp on and off (as for an advertising display) | - |
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| (noun) a light that flashes on and off; used as a signal or to send messages | Synonyms: blinker |
| (noun) someone with a compulsive desire to expose the genitals | Synonyms: exhibitionist |
| flashflood | (noun) a sudden local flood of great volume and short duration | Synonyms: flash flood |
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| flashgun | (noun) a lamp for providing momentary light to take a photograph | Synonyms: flash, flash bulb, flash lamp, flashbulb, photoflash |
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| flashiness | (noun) tasteless showiness | Synonyms: brashness, garishness, gaudiness, glitz, loudness, meretriciousness, tawdriness |
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| flashing | (noun) sheet metal shaped and attached to a roof for strength and weatherproofing | - |
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| (noun) a short vivid experience | Synonyms: flash |
| flashlight | (noun) a small portable battery-powered electric lamp | Synonyms: torch |
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| flashover | (noun) an unintended electric discharge (as over or around an insulator) | - |
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| flashpoint | (noun) the lowest temperature at which the vapor of a combustible liquid can be ignited in air | Synonyms: flash point |
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| (noun) a place of political unrest and potential violence | Synonyms: hot spot, hotspot, trouble spot |
| (noun) point at which something is ready to blow up | Synonyms: flash point |
| flask | (noun) bottle that has a narrow neck | - |
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| (noun) the quantity a flask will hold | Synonyms: flaskful |
| flaskful | (noun) the quantity a flask will hold | Synonyms: flask |
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| flat | (noun) a suite of rooms usually on one floor of an apartment house | Synonyms: apartment |
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| (noun) scenery consisting of a wooden frame covered with painted canvas; part of a stage setting | - |
| (noun) a deflated pneumatic tire | Synonyms: flat tire |
| (noun) freight car without permanent sides or roof | Synonyms: flatbed, flatcar |
| (noun) a shallow box in which seedlings are started | - |
| (noun) a musical notation indicating one half step lower than the note named | - |
| (noun) a level tract of land | - |
| flatbed | (noun) an open truck bed or trailer with no sides; used to carry large heavy objects | - |
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| (noun) freight car without permanent sides or roof | Synonyms: flat, flatcar |
| flatboat | (noun) a flatbottom boat for carrying heavy loads (especially on canals) | Synonyms: barge, hoy, lighter |
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| flatbread | (noun) any of various breads made from usually unleavened dough | - |
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| flatbrod | (noun) the thin wafer-like bread of Scandinavia | - |
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| flatcar | (noun) freight car without permanent sides or roof | Synonyms: flat, flatbed |
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| flatfish | (noun) any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side | - |
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| (noun) sweet lean whitish flesh of any of numerous thin-bodied fish; usually served as thin fillets | - |
| flatfoot | (noun) a foot afflicted with a fallen arch; abnormally flattened and spread out | Synonyms: pes planus, splayfoot |
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| (noun) a policeman who patrols a given region | Synonyms: patrolman |
| flathead | (noun) food fish of the Indonesian region of the Pacific; resembles gurnards | - |
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| (noun) pallid bottom-dwelling flat-headed fish with large eyes and a duck-like snout | - |
| flatiron | (noun) an iron that was heated by placing it on a stove | - |
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| flatlet | (noun) a tiny flat | - |
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| flatmate | (noun) an associate who shares an apartment with you | - |
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| flatness | (noun) the property of having two dimensions | Synonyms: planeness, two-dimensionality |
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| (noun) inactivity; showing an unusual lack of energy | Synonyms: languor, lethargy, phlegm, sluggishness |
| (noun) the property of having little or no contrast; lacking highlights or gloss | Synonyms: lusterlessness, lustrelessness, mat, matt, matte |
| (noun) a deficiency in flavor | - |
| (noun) a want of animation or brilliance | - |
| flats | (noun) footwear (shoes or slippers) with no heel (or a very low heel) | - |
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| flatterer | (noun) a person who uses flattery | Synonyms: adulator |
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| flattery | (noun) excessive or insincere praise | - |
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| flattop | (noun) a large warship that carries planes and has a long flat deck for takeoffs and landings | Synonyms: aircraft carrier, attack aircraft carrier, carrier |
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| (noun) a closely cropped haircut; usually for men or boys | Synonyms: butch, crew cut |
| flatulence | (noun) pompously embellished language | Synonyms: turgidity, turgidness |
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| (noun) a state of excessive gas in the alimentary canal | Synonyms: flatulency, gas |
| flatulency | (noun) a state of excessive gas in the alimentary canal | Synonyms: flatulence, gas |
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| flatus | (noun) a reflex that expels intestinal gas through the anus | Synonyms: breaking wind, fart, farting, wind |
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| flatware | (noun) silverware eating utensils | Synonyms: silver |
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| (noun) tableware that is relatively flat and fashioned as a single piece | - |
| flatwork | (noun) ironing that can be done mechanically | Synonyms: flat wash |
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| flatworm | (noun) parasitic or free-living worms having a flattened body | Synonyms: platyhelminth |
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| flaunt | (noun) the act of displaying something ostentatiously | - |
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| flautist | (noun) someone who plays the flute | Synonyms: flute player, flutist |
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| flavin | (noun) a ketone that forms the nucleus of certain natural yellow pigments like riboflavin | - |
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| flavivirus | (noun) animal viruses belonging to the family Flaviviridae | - |
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| flavone | (noun) a colorless crystalline compound that is part of a number of white or yellow plant pigments | - |
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| flavonoid | (noun) any of a large class of plant pigments having a chemical structure based on or similar to flavone | - |
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| flavor | (noun) the taste experience when a savoury condiment is taken into the mouth | Synonyms: flavour, nip, relish, sapidity, savor, savour, smack, tang |
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| (noun) (physics) the six kinds of quarks | Synonyms: flavour |
| (noun) the general atmosphere of a place or situation and the effect that it has on people | Synonyms: feel, feeling, flavour, look, smell, spirit, tone |
| flavorer | (noun) something added to food primarily for the savor it imparts | Synonyms: flavoring, flavourer, flavouring, seasoner, seasoning |
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| flavoring | (noun) something added to food primarily for the savor it imparts | Synonyms: flavorer, flavourer, flavouring, seasoner, seasoning |
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| flavorlessness | (noun) the property of having no flavor | Synonyms: flavourlessness, savorlessness, savourlessness, tastelessness |
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| flavorsomeness | (noun) having an appetizing flavor | Synonyms: flavoursomeness, savoriness |
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| flavour | (noun) the taste experience when a savoury condiment is taken into the mouth | Synonyms: flavor, nip, relish, sapidity, savor, savour, smack, tang |
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| (noun) (physics) the six kinds of quarks | Synonyms: flavor |
| (noun) the general atmosphere of a place or situation and the effect that it has on people | Synonyms: feel, feeling, flavor, look, smell, spirit, tone |
| flavourer | (noun) something added to food primarily for the savor it imparts | Synonyms: flavorer, flavoring, flavouring, seasoner, seasoning |
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| flavouring | (noun) something added to food primarily for the savor it imparts | Synonyms: flavorer, flavoring, flavourer, seasoner, seasoning |
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| flavourlessness | (noun) the property of having no flavor | Synonyms: flavorlessness, savorlessness, savourlessness, tastelessness |
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| flavoursomeness | (noun) having an appetizing flavor | Synonyms: flavorsomeness, savoriness |
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| flaw | (noun) an imperfection in an object or machine | Synonyms: defect, fault |
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| (noun) defect or weakness in a person's character | - |
| (noun) an imperfection in a plan or theory or legal document that causes it to fail or that reduces its effectiveness | - |
| flawlessness | (noun) the state of being without a flaw or defect | Synonyms: ne plus ultra, perfection |
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| flax | (noun) plant of the genus Linum that is cultivated for its seeds and for the fibers of its stem | - |
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| (noun) fiber of the flax plant that is made into thread and woven into linen fabric | - |
| flaxseed | (noun) the seed of flax used as a source of oil | Synonyms: linseed |
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| flea | (noun) any wingless bloodsucking parasitic insect noted for ability to leap | - |
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| fleabag | (noun) a run-down hotel | - |
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| fleabane | (noun) hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas | Synonyms: feabane mullet, Pulicaria dysenterica |
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| (noun) any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas | - |
| (noun) common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron | Synonyms: Canadian fleabane, Conyza canadensis, Erigeron canadensis, horseweed |
| fleapit | (noun) an old shabby movie theater | - |
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| fleawort | (noun) plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative | Synonyms: Plantago psyllium, psyllium, Spanish psyllium |
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| flecainide | (noun) oral antiarrhythmic medication (trade name Tambocor) used as a last resort in treating arrhythmias; increases the risk of sudden death in heart attack patients | Synonyms: Tambocor |
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| fleck | (noun) a small contrasting part of something | Synonyms: dapple, maculation, patch, speckle, spot |
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| (noun) a small fragment of something broken off from the whole | Synonyms: bit, chip, flake, scrap |
| flection | (noun) deviation from a straight or normal course | Synonyms: flexion, inflection |
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| (noun) the state of being flexed (as of a joint) | Synonyms: flexion, flexure |
| fledgeling | (noun) young bird that has just fledged or become capable of flying | Synonyms: fledgling |
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| (noun) any new participant in some activity | Synonyms: entrant, fledgling, freshman, neophyte, newbie, newcomer, starter |
| fledgling | (noun) young bird that has just fledged or become capable of flying | Synonyms: fledgeling |
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| (noun) any new participant in some activity | Synonyms: entrant, fledgeling, freshman, neophyte, newbie, newcomer, starter |
| fleece | (noun) outer coat of especially sheep and yaks | Synonyms: wool |
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| (noun) a soft bulky fabric with deep pile; used chiefly for clothing | - |
| (noun) the wool of a sheep or similar animal | - |
| (noun) tanned skin of a sheep with the fleece left on; used for clothing | Synonyms: sheepskin |
| fleer | (noun) someone who flees from an uncongenial situation | Synonyms: fugitive, runaway |
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| (noun) contempt expressed by mockery in looks or words | - |
| fleet | (noun) a group of warships organized as a tactical unit | - |
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| (noun) a group of steamships operating together under the same ownership | - |
| (noun) group of motor vehicles operating together under the same ownership | - |
| (noun) group of aircraft operating together under the same ownership | - |
| fleetingness | (noun) the property of lasting for a very short time | Synonyms: ephemerality, ephemeralness |
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| fleetness | (noun) rapidity of movement | - |
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