| fartlek | (noun) a method of athletic training (especially for runners) in which strenuous effort and normal effort alternate in a continuous exercise | - |
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| fatback | (noun) salt pork from the back of a hog carcass | - |
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| feedback | (noun) response to an inquiry or experiment | - |
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| (noun) the process in which part of the output of a system is returned to its input in order to regulate its further output | - |
| feedstock | (noun) the raw material that is required for some industrial process | - |
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| fenugreek | (noun) aromatic seeds used as seasoning especially in curry | Synonyms: fenugreek seed |
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| (noun) annual herb or southern Europe and eastern Asia having off-white flowers and aromatic seeds used medicinally and in curry | Synonyms: Greek clover, Trigonella foenumgraecum |
| fetlock | (noun) projection behind and above a horse's hoof | - |
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| (noun) the joint between the cannon bone and the pastern | Synonyms: fetlock joint |
| fiddleneck | (noun) hairy annual of California to Mexico with crowded cymes of small blue to lilac or mauve flowers | Synonyms: Phacelia tanacetifolia |
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| fiddlestick | (noun) a bow used in playing the violin | Synonyms: violin bow |
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| fieldwork | (noun) a temporary fortification built by troops in the field | - |
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| finback | (noun) large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific | Synonyms: Balaenoptera physalus, common rorqual, fin whale, finback whale |
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| fingermark | (noun) a smudge made by a (dirty) finger | Synonyms: fingerprint |
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| fink | (noun) someone acting as an informer or decoy for the police | Synonyms: canary, sneak, sneaker, snitch, snitcher, stool pigeon, stoolie, stoolpigeon |
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| (verb) confess to a punishable or reprehensible deed, usually under pressure | Synonyms: confess, squeal |
| (verb) take the place of work of someone on strike | Synonyms: blackleg, rat, scab |
| firebreak | (noun) a narrow field that has been cleared to check the spread of a prairie fire or forest fire | Synonyms: fireguard |
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| firebrick | (noun) brick made of fire clay; used for lining e.g. furnaces and chimneys | - |
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| firelock | (noun) a muzzle loader that had a flintlock type of gunlock | Synonyms: flintlock |
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| firework | (noun) (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc. | Synonyms: pyrotechnic |
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| fishhook | (noun) a sharp barbed hook for catching fish | - |
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| flack | (noun) artillery designed to shoot upward at airplanes | Synonyms: ack-ack, ack-ack gun, antiaircraft, antiaircraft gun, flak, pom-pom |
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| (noun) intense adverse criticism | Synonyms: attack, blast, fire, flak |
| (noun) a slick spokesperson who can turn any criticism to the advantage of their employer | Synonyms: flack catcher, flak, flak catcher |
| flak | (noun) artillery designed to shoot upward at airplanes | Synonyms: ack-ack, ack-ack gun, antiaircraft, antiaircraft gun, flack, pom-pom |
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| (noun) intense adverse criticism | Synonyms: attack, blast, fire, flack |
| (noun) a slick spokesperson who can turn any criticism to the advantage of their employer | Synonyms: flack, flack catcher, flak catcher |
| 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 | - |
| (verb) be located at the sides of something or somebody | - |
| 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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| 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) | - |
| flask | (noun) bottle that has a narrow neck | - |
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| (noun) the quantity a flask will hold | Synonyms: flaskful |
| flatwork | (noun) ironing that can be done mechanically | Synonyms: flat wash |
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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 |
| (verb) make a spot or mark onto | Synonyms: blob, blot, spot |
| flick | (noun) a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement | Synonyms: film, motion-picture show, motion picture, movie, moving-picture show, moving picture, pic, picture, picture show |
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| (noun) a short stroke | - |
| (noun) a light sharp contact (usually with something flexible) | - |
| (verb) remove with a flick (of the hand) | - |
| (verb) touch or hit with a light, quick blow | - |
| (verb) cause to make a snapping sound | Synonyms: click, snap |
| (verb) throw or toss with a quick motion | Synonyms: jerk |
| (verb) twitch or flutter | Synonyms: riffle, ruffle |
| (verb) cause to move with a flick | Synonyms: flip |
| (verb) flash intermittently | Synonyms: flicker |
| (verb) look through a book or other written material | Synonyms: flip, leaf, riff, riffle, thumb |
| (verb) shine unsteadily | Synonyms: flicker |
| flintlock | (noun) an obsolete gunlock that has flint embedded in the hammer; the flint makes a spark that ignites the charge | - |
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| (noun) a muzzle loader that had a flintlock type of gunlock | Synonyms: firelock |
| flock | (noun) a group of birds | - |
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| (noun) a group of sheep or goats | Synonyms: fold |
| (noun) a church congregation guided by a pastor | - |
| (noun) an orderly crowd | Synonyms: troop |
| (noun) (often followed by `of') a large number or amount or extent | Synonyms: batch, deal, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, muckle, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, stack, tidy sum, wad |
| (verb) come together as in a cluster or flock | Synonyms: clump, cluster, constellate |
| (verb) move as a crowd or in a group | - |
| flunk | (noun) failure to reach a minimum required performance | Synonyms: failing |
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| (verb) fail to get a passing grade | Synonyms: bomb, fail, flush it |
| flyspeck | (adjective) very small | Synonyms: bantam, diminutive, lilliputian, midget, petite, tiny |
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| (noun) a tiny dark speck made by the excrement of a fly | - |
| fogbank | (noun) a large mass of fog on the sea (as seen from a distance) | - |
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| folk | (noun) the traditional and typically anonymous music that is an expression of the life of people in a community | Synonyms: ethnic music, folk music |
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| (noun) people in general (often used in the plural) | Synonyms: common people, folks |
| (noun) a social division of (usually preliterate) people | Synonyms: tribe |
| (noun) people descended from a common ancestor | Synonyms: family, family line, kinfolk, kinsfolk, phratry, sept |
| follback | (verb) to return someone's following of you on a social media platform | - |
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| footmark | (noun) a mark of a foot or shoe on a surface | Synonyms: footprint, step |
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| footwork | (noun) the manner of using the feet | - |
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| (noun) skillful maneuvering or dealing | - |
| foredeck | (noun) the deck between the bridge and the forecastle | - |
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| forelock | (noun) a lock of a horse's mane that grows forward between the ears | Synonyms: foretop |
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| (noun) a lock of hair growing (or falling) over the forehead | - |
| foremilk | (noun) milky fluid secreted for the first day or two after parturition | Synonyms: colostrum |
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| foreshank | (noun) a cut of meat from the upper part of a front leg | - |
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| foreshock | (noun) a tremor preceding an earthquake | - |
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| fork | (noun) the act of branching out or dividing into branches | Synonyms: branching, forking, ramification |
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| (noun) a utensil with two or more prongs, used for serving or eating food | - |
| (noun) an agricultural tool used for lifting or digging; has a handle and metal prongs | - |
| (noun) the angle formed by the inner sides of the legs where they join the human trunk | Synonyms: crotch |
| (noun) the region of the angle formed by the junction of two branches | Synonyms: crotch |
| (verb) divide into two or more branches so as to form a fork | Synonyms: branch, furcate, ramify, separate |
| (verb) shape like a fork | - |
| (verb) place under attack with one's own pieces, of two enemy pieces | - |
| (verb) lift with a pitchfork | Synonyms: pitchfork |
| framework | (noun) a structure supporting or containing something | Synonyms: frame |
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| (noun) the underlying structure | Synonyms: fabric |
| (noun) a hypothetical description of a complex entity or process | Synonyms: model, theoretical account |
| frank | (adjective) characterized by directness in manner or speech; without subtlety or evasion | Synonyms: blunt, candid, forthright, free-spoken, outspoken, plainspoken, point-blank, straight-from-the-shoulder |
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| (adjective) clearly manifest; evident | - |
| (noun) device or marking such as postage stamp, printed or stamped impressions, codings, labels, manuscript writings, or any other authorized form of markings affixed or applied to mails to qualify them to be postally serviced. | Synonyms: franking |
| (noun) a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll | Synonyms: dog, frankfurter, hot dog, hotdog, weenie, wiener, wienerwurst |
| (verb) exempt by means of an official pass or letter, as from customs or other checks | - |
| (verb) stamp with a postmark to indicate date and time of mailing | Synonyms: postmark |
| freak | (noun) a person or animal that is markedly unusual or deformed | Synonyms: lusus naturae, monster, monstrosity |
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| (noun) someone who is so ardently devoted to something that it resembles an addiction | Synonyms: addict, junkie, junky, nut |
| (verb) lose one's nerve | Synonyms: freak out, gross out |
| fretwork | (noun) framework consisting of an ornamental design made of strips of wood or metal | Synonyms: lattice, latticework |
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| frisk | (noun) the act of searching someone for concealed weapons or illegal drugs | Synonyms: frisking |
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| (verb) search as for concealed weapons by running the hands rapidly over the clothing and through the pockets | - |
| (verb) play boisterously | Synonyms: cavort, disport, frolic, gambol, lark, lark about, rollick, romp, run around, skylark, sport |
| frock | (noun) a one-piece garment for a woman; has skirt and bodice | Synonyms: dress |
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| (noun) a habit worn by clerics | - |
| (noun) a long, loose outer garment | - |
| (verb) put a frock on | - |
| fuck | (noun) slang for sexual intercourse | Synonyms: ass, fucking, nookie, nooky, piece of ass, piece of tail, roll in the hay, screw, screwing, shag, shtup |
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| (noun) Strongly and emphatically all of something | - |
| (verb) have sexual intercourse with | Synonyms: bang, be intimate, bed, bonk, do it, eff, get it on, get laid, have a go at it, have intercourse, have it away, have it off, have sex, hump, jazz, know, lie with, love, make love, make out, roll in the hay, screw, sleep together, sleep with |
| fullback | (noun) (American football) the position of a back on a football team, generally larger in size than halfbacks | - |
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| (noun) (football) the running back who plays the fullback position on the offensive team | - |
| (verb) play the fullback | - |
| funk | (noun) an earthy type of jazz combining it with blues and soul; has a heavy bass line that accentuates the first beat in the bar | - |
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| (noun) a state of nervous depression | Synonyms: blue funk |
| (verb) draw back, as with fear or pain | Synonyms: cringe, flinch, quail, recoil, shrink, squinch, wince |
| gamecock | (noun) a cock bred and trained for fighting | Synonyms: fighting cock |
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| (noun) someone who is a very fierce fighter | Synonyms: hell-kite, hell-rooster |
| gangplank | (noun) a temporary bridge for getting on and off a vessel at dockside | Synonyms: gangboard, gangway |
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| gank | (verb) to kill with little effort in a video game | - |
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| gaolbreak | (noun) an escape from jail | Synonyms: break, breakout, jailbreak, prison-breaking, prisonbreak |
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| gasmask | (noun) a protective mask with a filter; protects the face and lungs against poisonous gases | Synonyms: gas helmet, respirator |
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| gawk | (noun) an awkward stupid person | Synonyms: clod, goon, lout, lubber, lummox, lump, oaf, stumblebum |
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| (verb) look with amazement; look stupidly | Synonyms: gape, gawp, goggle |
| gearstick | (noun) a mechanical device for engaging and disengaging gears | Synonyms: gear lever, gearshift, shifter |
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| geek | (noun) a person with an unusual or odd personality | Synonyms: eccentric, eccentric person, flake, oddball |
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| (noun) a carnival performer who does disgusting acts | - |
| (verb) to be intoxicated | - |
| gemsbok | (noun) large South African oryx with a broad black band along its flanks | Synonyms: gemsbuck, Oryx gazella |
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| gemsbuck | (noun) large South African oryx with a broad black band along its flanks | Synonyms: gemsbok, Oryx gazella |
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| gentlefolk | (noun) people of good family and breeding and high social status | - |
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| geoduck | (noun) a large edible clam found burrowing deeply in sandy mud along the Pacific coast of North America; weighs up to six pounds; has siphons that can extend to several feet and cannot be withdrawn into the shell | - |
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| gerenuk | (noun) slender East African antelope with slim neck and backward-curving horns | Synonyms: Litocranius walleri |
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| gimcrack | (adjective) tastelessly showy | Synonyms: brassy, cheap, flash, flashy, garish, gaudy, loud, meretricious, tacky, tatty, tawdry, trashy |
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| (noun) ornamental objects of no great value | Synonyms: falderol, folderal, frill, gimcrackery, nonsense, trumpery |
| gimmick | (noun) any clever maneuver | Synonyms: device, twist |
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| (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doodad, doohickey, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
| (noun) a drawback or difficulty that is not readily evident | Synonyms: catch |
| glasswork | (noun) an article of tableware made of glass | Synonyms: glassware |
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| gobbledygook | (noun) incomprehensible or pompous jargon of specialists | - |
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| goldbrick | (noun) anything that is supposed to be valuable but turns out to be worthless | - |
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| (noun) a brick-shaped block that looks like gold but is not | - |
| (noun) an idle worthless person | Synonyms: good-for-naught, good-for-nothing, goof-off, ne'er-do-well, no-account |
| (noun) a soldier who performs his duties without proper care or effort | - |
| (verb) avoid (one's assigned duties) | Synonyms: fiddle, shirk, shrink from |
| (verb) deprive of by deceit | Synonyms: bunco, con, defraud, diddle, hornswoggle, mulct, nobble, rook, scam, short-change, swindle, victimize |
| gook | (noun) any thick, viscous matter | Synonyms: goo, goop, guck, gunk, muck, ooze, slime, sludge |
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| gooseneck | (noun) something in a thin curved form (like the neck of a goose) | - |
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| goshawk | (noun) large hawk of Eurasia and North America used in falconry | Synonyms: Accipiter gentilis |
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| grayback | (noun) a dowitcher with a grey back | Synonyms: greyback, Limnodromus griseus |
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| (noun) a sandpiper that breeds in the Arctic and winters in the Southern Hemisphere | Synonyms: Calidris canutus, greyback, knot |
| greenback | (noun) a piece of paper money (especially one issued by a central bank) | Synonyms: bank bill, bank note, banker's bill, banknote, bill, Federal Reserve note, government note, note |
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| greenshank | (noun) large European sandpiper with greenish legs | Synonyms: Tringa nebularia |
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| greensick | (adjective) of or pertaining to or suffering from chlorosis | Synonyms: chlorotic |
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| greyback | (noun) a dowitcher with a grey back | Synonyms: grayback, Limnodromus griseus |
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| (noun) a sandpiper that breeds in the Arctic and winters in the Southern Hemisphere | Synonyms: Calidris canutus, grayback, knot |
| (noun) `Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms | Synonyms: Johnny, Johnny Reb, Reb, Rebel |
| gridlock | (noun) a traffic jam so bad that no movement is possible | - |
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| grillwork | (noun) mesh netting made of wires | Synonyms: wirework |
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| (noun) a framework of metal bars used as a partition or a grate | Synonyms: grill, grille |
| gripsack | (noun) a small suitcase | - |
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| gritrock | (noun) a hard coarse-grained siliceous sandstone | Synonyms: grit, gritstone |
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| groak | (verb) look or stare at longingly | - |
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| grok | (verb) get the meaning of something | Synonyms: apprehend, compass, comprehend, dig, get the picture, grasp, savvy |
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| grosbeak | (noun) any of various finches of Europe or America having a massive and powerful bill | Synonyms: grossbeak |
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| grossbeak | (noun) any of various finches of Europe or America having a massive and powerful bill | Synonyms: grosbeak |
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| groundwork | (noun) preliminary preparation as a basis or foundation | - |
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| (noun) lowest support of a structure | Synonyms: base, foot, foundation, fundament, substructure, understructure |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: base, basis, cornerstone, foundation, fundament |
| groupthink | (noun) decision making by a group (especially in a manner that discourages creativity or individual responsibility) | - |
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| guck | (noun) any thick, viscous matter | Synonyms: goo, gook, goop, gunk, muck, ooze, slime, sludge |
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| guesswork | (noun) an estimate based on little or no information | Synonyms: dead reckoning, guess, guessing, shot |
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| guidebook | (noun) something that offers basic information or instruction | Synonyms: guide |
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| gunk | (noun) any thick, viscous matter | Synonyms: goo, gook, goop, guck, muck, ooze, slime, sludge |
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| gunlock | (noun) the action that ignites the charge in a firearm | Synonyms: firing mechanism |
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| gunnysack | (noun) a bag made of burlap | Synonyms: burlap bag, gunny sack |
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| gunstock | (noun) the handle of a handgun or the butt end of a rifle or shotgun or part of the support of a machine gun or artillery gun | Synonyms: stock |
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| hacek | (noun) a diacritical mark (an inverted circumflex) placed above certain letters (such as the letter c) to indicate pronunciation | Synonyms: wedge |
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| hack | (noun) a horse kept for hire | - |
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| (noun) an old or over-worked horse | Synonyms: jade, nag, plug |
| (noun) a saddle horse used for transportation rather than sport etc. | - |
| (noun) a car driven by a person whose job is to take passengers where they want to go in exchange for money | Synonyms: cab, taxi, taxicab |
| (noun) a tool (as a hoe or pick or mattock) used for breaking up the surface of the soil | - |
| (noun) one who works hard at boring tasks | Synonyms: drudge, hacker |
| (noun) a mediocre and disdained writer | Synonyms: hack writer, literary hack |
| (noun) a politician who belongs to a small clique that controls a political party for private rather than public ends | Synonyms: machine politician, political hack, ward-heeler |
| (verb) cough spasmodically | Synonyms: whoop |
| (verb) significantly cut up a manuscript | Synonyms: cut up |
| (verb) fix a computer program piecemeal until it works | Synonyms: hack on |
| (verb) kick on the shins | - |
| (verb) kick on the arms | - |
| (verb) cut away | - |
| (verb) cut with a hacking tool | Synonyms: chop |
| (verb) be able to manage or manage successfully | Synonyms: cut |
| hackmatack | (noun) poplar of northeastern North America with broad heart-shaped leaves | Synonyms: balsam poplar, Populus balsamifera, tacamahac |
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| hackwork | (noun) professional work done according to formula | - |
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| (noun) (Literary & Literary Critical Terms) undistinguished literary work produced to order. | - |
| haddock | (noun) important food fish on both sides of the Atlantic; related to cod but usually smaller | Synonyms: Melanogrammus aeglefinus |
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| (noun) lean white flesh of fish similar to but smaller than cod; usually baked or poached or as fillets sauteed or fried | - |
| haick | (noun) an outer garment consisting of a large piece of white cloth; worn by men and women in northern Africa | Synonyms: haik |
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| haik | (noun) an outer garment consisting of a large piece of white cloth; worn by men and women in northern Africa | Synonyms: haick |
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