| aftershock | (noun) a tremor (or one of a series of tremors) occurring after the main shock of an earthquake | - |
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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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| airlock | (noun) a chamber that provides access to space where air is under pressure | Synonyms: air lock |
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| alpenstock | (noun) a stout staff with a metal point; used by mountain climbers | - |
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| antiknock | (noun) any of various compounds that are added to gasoline to reduce engine knocking | - |
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| ballcock | (noun) floating ball that controls level in a water tank | Synonyms: ball cock |
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| ballock | (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, bollock, egg, nut, orchis, testicle, testis |
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| bannock | (noun) a flat bread made of oat or barley flour; common in New England and Scotland | - |
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| bedrock | (noun) principles from which other truths can be derived | Synonyms: basic principle, basics, fundamental principle, fundamentals |
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| (noun) solid unweathered rock lying beneath surface deposits of soil | - |
| bitstock | (noun) a carpenter's tool having a crank handle for turning and a socket to hold a bit for boring | Synonyms: brace |
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| blackcock | (noun) male black grouse | Synonyms: black cock |
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| block | (noun) the act of obstructing or deflecting someone's movements | Synonyms: blocking |
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| (noun) a solid piece of something (usually having flat rectangular sides) | - |
| (noun) an obstruction in a pipe or tube | Synonyms: blockage, closure, occlusion, stop, stoppage |
| (noun) a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope | Synonyms: pulley-block, pulley, pulley block |
| (noun) a metal casting containing the cylinders and cooling ducts of an engine | Synonyms: cylinder block, engine block |
| (noun) a platform from which an auctioneer sells | Synonyms: auction block |
| (noun) housing in a large building that is divided into separate units | - |
| (noun) an inability to remember or think of something you normally can do; often caused by emotional tension | Synonyms: mental block |
| (noun) a number or quantity of related things dealt with as a unit | - |
| (noun) a rectangular area in a city surrounded by streets and usually containing several buildings | Synonyms: city block |
| (noun) (computer science) a sector or group of sectors that function as the smallest data unit permitted | - |
| (noun) a three-dimensional shape with six square or rectangular sides | Synonyms: cube |
| blockade | (noun) a war measure that isolates some area of importance to the enemy | Synonyms: encirclement |
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| (noun) prevents access or progress | - |
| blockage | (noun) the act of blocking | Synonyms: closure, occlusion |
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| (noun) an obstruction in a pipe or tube | Synonyms: block, closure, occlusion, stop, stoppage |
| (noun) the physical condition of blocking or filling a passage with an obstruction | Synonyms: obstruction |
| blockbuster | (noun) an unusually successful hit with widespread popularity and huge sales (especially a movie or play or recording or novel) | Synonyms: megahit, smash hit |
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| (noun) a large bomb used to demolish extensive areas (as a city block) | - |
| blocker | (noun) a class of drugs that inhibit (block) some biological process | Synonyms: blocking agent |
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| (noun) a football player whose responsibility is to block players attempting to stop an offensive play | - |
| blockhead | (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: bonehead, dumbass, dunce, dunderhead, fuckhead, hammerhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead |
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| blockhouse | (noun) a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire | - |
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| blocking | (noun) the act of obstructing or deflecting someone's movements | Synonyms: block |
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| bloodstock | (noun) thoroughbred horses (collectively) | - |
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| bluestocking | (noun) a woman having literary or intellectual interests | Synonyms: bas bleu |
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| bobbysock | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysocks |
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| bobbysocks | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysock |
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| bock | (noun) a very strong lager traditionally brewed in the fall and aged through the winter for consumption in the spring | Synonyms: bock beer |
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| bollock | (noun) a pulley-block at the head of a topmast | Synonyms: bullock block |
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| (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, ballock, egg, nut, orchis, testicle, testis |
| boondocks | (noun) a remote and undeveloped area | Synonyms: back country, backwoods, hinterland |
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| breechblock | (noun) a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing | Synonyms: breech closer |
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| brocket | (noun) small South American deer with unbranched antlers | - |
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| (noun) male red deer in its second year | - |
| bullock | (noun) castrated bull | Synonyms: steer |
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| (noun) young bull | - |
| burdock | (noun) any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs | Synonyms: clotbur |
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| buttock | (noun) either of the two large fleshy masses of muscular tissue that form the human rump | Synonyms: cheek |
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| buttocks | (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
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| cassock | (noun) a black garment reaching down to the ankles; worn by priests or choristers | - |
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| cellblock | (noun) a division of a prison (usually consisting of several cells) | Synonyms: ward |
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| chadlock | (noun) weedy Eurasian plant often a pest in grain fields | Synonyms: Brassica kaber, charlock, field mustard, Sinapis arvensis, wild mustard |
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| charlock | (noun) weedy Eurasian plant often a pest in grain fields | Synonyms: Brassica kaber, chadlock, field mustard, Sinapis arvensis, wild mustard |
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| chock | (noun) a block of wood used to prevent the sliding or rolling of a heavy object | Synonyms: wedge |
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| clock | (noun) a timepiece that shows the time of day | - |
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| clocking | (noun) the time taken to traverse a measured course | - |
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| clockmaker | (noun) someone whose occupation is making or repairing clocks and watches | Synonyms: clocksmith |
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| clocks | (noun) European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage | Synonyms: alfilaria, alfileria, Erodium cicutarium, filaree, filaria, pin clover, pin grass, redstem storksbill |
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| clocksmith | (noun) someone whose occupation is making or repairing clocks and watches | Synonyms: clockmaker |
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| clockwork | (noun) any mechanism of geared wheels that is driven by a coiled spring; resembles the works of a mechanical clock | - |
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| cock | (noun) adult male bird | - |
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| (noun) adult male chicken | Synonyms: rooster |
| (noun) faucet consisting of a rotating device for regulating flow of a liquid | Synonyms: stopcock, turncock |
| (noun) the part of a gunlock that strikes the percussion cap when the trigger is pulled | Synonyms: hammer |
| (noun) obscene terms for penis | Synonyms: dick, pecker, prick, putz, shaft, tool |
| cockade | (noun) an ornament (such as a knot of ribbon or a rosette) usually worn on the hat | - |
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| cockateel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockatiel, cockatoo parrot, Nymphicus hollandicus |
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| cockatiel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockateel, cockatoo parrot, Nymphicus hollandicus |
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| cockatoo | (noun) white or light-colored crested parrot of the Australian region; often kept as cage birds | - |
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| cockatrice | (noun) monster hatched by a reptile from a cock's egg; able to kill with a glance | - |
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| cockchafer | (noun) any of various large European beetles destructive to vegetation as both larvae and adult | Synonyms: May beetle, May bug, Melolontha melolontha |
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| cockcrow | (noun) the first light of day | Synonyms: aurora, break of day, break of the day, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
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| cocker | (noun) a small breed with wavy silky hair; originally developed in England | Synonyms: cocker spaniel, English cocker spaniel |
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| cockerel | (noun) a young domestic cock; not older than one year | - |
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| cockfight | (noun) a match in a cockpit between two fighting cocks heeled with metal gaffs | - |
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| cockfighting | (noun) participation in the sport of matching gamecocks in a cockfight | - |
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| cockhorse | (noun) anything used as a toy horse (such as a rocking horse or one knee of an adult) | - |
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| cockiness | (noun) offensive boldness and assertiveness | Synonyms: bumptiousness, forwardness, pushiness |
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| cockle | (noun) common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs | - |
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| (noun) common edible European bivalve | - |
| cocklebur | (noun) any coarse weed of the genus Xanthium having spiny burrs | Synonyms: cockle-bur, cockle-burr, cockleburr |
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| (noun) burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use | Synonyms: Arctium lappa, great burdock, greater burdock |
| cockleburr | (noun) any coarse weed of the genus Xanthium having spiny burrs | Synonyms: cockle-bur, cockle-burr, cocklebur |
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| cockleshell | (noun) a small light flimsy boat | - |
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| cockloft | (noun) a small loft or garret | - |
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| cockney | (noun) the nonstandard dialect of natives of the east end of London | - |
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| cockpit | (noun) compartment where the pilot sits while flying the aircraft | - |
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| (noun) seat where the driver sits while driving a racing car | - |
| (noun) a pit for cockfights | - |
| cockroach | (noun) any of numerous chiefly nocturnal insects; some are domestic pests | Synonyms: roach |
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| cockscomb | (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: comb, coxcomb |
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| (noun) a cap worn by court jesters; adorned with a strip of red | Synonyms: coxcomb |
| (noun) a conceited dandy who is overly impressed by his own accomplishments | Synonyms: coxcomb |
| (noun) garden annual with featherlike spikes of red or yellow flowers | Synonyms: Celosia argentea cristata, Celosia cristata, common cockscomb |
| cocksfoot | (noun) widely grown stout Old World hay and pasture grass | Synonyms: cockspur, Dactylis glomerata, orchard grass |
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| cockspur | (noun) small spiny West Indian tree | Synonyms: Pisonia aculeata |
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| (noun) widely grown stout Old World hay and pasture grass | Synonyms: cocksfoot, Dactylis glomerata, orchard grass |
| cocksucker | (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, bastard, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
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| (noun) a person who performs fellatio | - |
| cocksureness | (noun) total certainty or greater certainty than circumstances warrant | Synonyms: certitude, overconfidence |
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| cocktail | (noun) a short mixed drink | - |
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| (noun) an appetizer served as a first course at a meal | - |
| cockup | (noun) something badly botched or muddled | Synonyms: balls-up, ballup, mess-up |
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| crock | (noun) an earthen jar (made of baked clay) | Synonyms: earthenware jar |
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| (noun) nonsense; foolish talk | - |
| (noun) a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink | Synonyms: carbon black, lampblack, smut, soot |
| crockery | (noun) tableware (eating and serving dishes) collectively | Synonyms: dishware |
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| crocket | (noun) an architectural ornament of curved foliage used at the edge of a spire or gable | - |
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| deadlock | (noun) a situation in which no progress can be made or no advancement is possible | Synonyms: dead end, impasse, stalemate, standstill |
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| diestock | (noun) a device that holds the dies that cut external threads on metal cylinders | - |
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| dock | (noun) the solid bony part of the tail of an animal as distinguished from the hair | - |
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| (noun) a short or shortened tail of certain animals | Synonyms: bob, bobtail |
| (noun) landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out | Synonyms: dockage, docking facility |
| (noun) a platform built out from the shore into the water and supported by piles; provides access to ships and boats | Synonyms: pier, wharf, wharfage |
| (noun) an enclosure in a court of law where the defendant sits during the trial | - |
| (noun) a platform where trucks or trains can be loaded or unloaded | Synonyms: loading dock |
| (noun) any of certain coarse weedy plants with long taproots, sometimes used as table greens or in folk medicine | Synonyms: sorrel, sour grass |
| dockage | (noun) the act of securing an arriving vessel with ropes | Synonyms: docking, moorage, tying up |
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| (noun) landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out | Synonyms: dock, docking facility |
| (noun) a fee charged for a vessel to use a dock | Synonyms: docking fee |
| docker | (noun) a laborer who loads and unloads vessels in a port | Synonyms: dock-walloper, dock worker, dockhand, dockworker, loader, longshoreman, lumper, stevedore |
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| docket | (noun) a temporally organized plan for matters to be attended to | Synonyms: agenda, schedule |
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| (noun) (law) the calendar of a court; the list of cases to be tried or a summary of the court's activities | - |
| dockhand | (noun) a laborer who loads and unloads vessels in a port | Synonyms: dock-walloper, dock worker, docker, dockworker, loader, longshoreman, lumper, stevedore |
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| docking | (noun) the act of securing an arriving vessel with ropes | Synonyms: dockage, moorage, tying up |
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| dockside | (noun) the region adjacent to a boat dock | - |
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| dockworker | (noun) a laborer who loads and unloads vessels in a port | Synonyms: dock-walloper, dock worker, docker, dockhand, loader, longshoreman, lumper, stevedore |
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| dockyard | (noun) an establishment on the waterfront where vessels are built or fitted out or repaired | - |
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| doorknocker | (noun) a device (usually metal and ornamental) attached by a hinge to a door | Synonyms: knocker, rapper |
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| doorlock | (noun) a lock on an exterior door | - |
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| dreadlock | (noun) one of many long thin braids of hair radiating from the scalp; popularized by Rastafarians | - |
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| drydock | (noun) a large dock from which water can be pumped out; used for building ships or for repairing a ship below its waterline | Synonyms: dry dock, graving dock |
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| dunnock | (noun) small brownish European songbird | Synonyms: hedge sparrow, Prunella modularis, sparrow |
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| electroshock | (noun) the administration of a strong electric current that passes through the brain to induce convulsions and coma | Synonyms: ECT, electroconvulsive therapy, electroshock therapy |
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| feedstock | (noun) the raw material that is required for some industrial process | - |
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| 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 |
| firelock | (noun) a muzzle loader that had a flintlock type of gunlock | Synonyms: flintlock |
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| 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 |
| footlocker | (noun) a trunk for storing personal possessions; usually kept at the foot of a bed (as in a barracks) | Synonyms: locker |
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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 | - |
| foreshock | (noun) a tremor preceding an earthquake | - |
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