| afterdeck | (noun) a deck abaft of midships | - |
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| 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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| amberjack | (noun) any of several amber to coppery fork-tailed warm-water carangid fishes | Synonyms: amberfish |
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| antiknock | (noun) any of various compounds that are added to gasoline to reduce engine knocking | - |
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| applejack | (noun) distilled from hard cider | - |
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| arrack | (noun) any of various strong liquors distilled from the fermented sap of toddy palms or from fermented molasses | Synonyms: arak |
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| attack | (noun) (military) an offensive against an enemy (using weapons) | Synonyms: onrush, onset, onslaught |
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| (noun) a decisive manner of beginning a musical tone or phrase | Synonyms: tone-beginning |
| (noun) the act of attacking | Synonyms: attempt |
| (noun) ideas or actions intended to deal with a problem or situation | Synonyms: approach, plan of attack |
| (noun) an offensive move in a sport or game | - |
| (noun) strong criticism | - |
| (noun) intense adverse criticism | Synonyms: blast, fire, flack, flak |
| (noun) the onset of a corrosive or destructive process (as by a chemical agent) | - |
| (noun) a sudden occurrence of an uncontrollable condition | - |
| back | (noun) (American football) the position of a player on a football team who is stationed behind the line of scrimmage | - |
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| (noun) the side that goes last or is not normally seen | Synonyms: rear |
| (noun) a support that you can lean against while sitting | Synonyms: backrest |
| (noun) the part of a garment that covers the back of your body | - |
| (noun) the protective covering on the front, back, and spine of a book | Synonyms: binding, book binding, cover |
| (noun) the posterior part of a human (or animal) body from the neck to the end of the spine | Synonyms: dorsum |
| (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: backbone, rachis, spinal column, spine, vertebral column |
| (noun) the part of something that is furthest from the normal viewer | Synonyms: rear |
| (noun) (football) a person who plays in the backfield | - |
| backpack | (noun) a bag carried by a strap on your back or shoulder | Synonyms: back pack, haversack, knapsack, packsack, rucksack |
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| bailiwick | (noun) a branch of knowledge | Synonyms: discipline, field, field of study, study, subject, subject area, subject field |
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| (noun) the area over which a bailiff has jurisdiction | - |
| baldrick | (noun) a wide (ornamented) belt worn over the right shoulder to support a sword or bugle by the left hip | Synonyms: baldric |
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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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| barmbrack | (noun) a rich currant cake or bun | - |
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| barrack | (noun) a building or group of buildings used to house military personnel | - |
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| beck | (noun) a beckoning gesture | - |
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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 | - |
| benedick | (noun) a newly married man (especially one who has long been a bachelor) | Synonyms: benedict |
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| billystick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, nightstick, truncheon |
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| bioattack | (noun) the use of bacteria or viruses or toxins to destroy men and animals or food | Synonyms: biologic attack, biological attack, biological warfare, BW |
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| biofeedback | (noun) a training program in which a person is given information about physiological processes (heart rate or blood pressure) that is not normally available with the goal of gaining conscious control of them | - |
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| 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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| black | (noun) black clothing (worn as a sign of mourning) | - |
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| (noun) (board games) the darker pieces | - |
| (noun) the quality or state of the achromatic color of least lightness (bearing the least resemblance to white) | Synonyms: blackness, inkiness |
| (noun) total absence of light | Synonyms: blackness, lightlessness, pitch blackness, total darkness |
| blackbuck | (noun) common Indian antelope with a dark back and spiral horns | Synonyms: Antilope cervicapra, black buck |
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| blackcock | (noun) male black grouse | Synonyms: black cock |
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| blackjack | (noun) a gambling game using cards; the object is to hold cards having a higher count than those dealt to the banker up to but not exceeding 21 | Synonyms: twenty-one, vingt-et-un |
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| (noun) a piece of metal covered by leather with a flexible handle; used for hitting people | Synonyms: cosh, sap |
| (noun) a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship | Synonyms: black flag, Jolly Roger, pirate flag |
| (noun) a common scrubby deciduous tree of central and southeastern United States having dark bark and broad three-lobed (club-shaped) leaves; tends to form dense thickets | Synonyms: blackjack oak, jack oak, Quercus marilandica |
| bladderwrack | (noun) a common rockweed used in preparing kelp and as manure | Synonyms: black rockweed, bladder fucus, Fucus vesiculosus, tang |
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| (noun) similar to and found with black rockweed | Synonyms: Ascophyllum nodosum |
| 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 |
| bloodstock | (noun) thoroughbred horses (collectively) | - |
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| blowback | (noun) Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gases created by the ignition of the propellant charge. | - |
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| (noun) misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service | - |
| (noun) the backward escape of gases and unburned gunpowder after a gun is fired | Synonyms: backfire |
| bluetick | (noun) a very fast American hound; white mottled with bluish grey | - |
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| bobbysock | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysocks |
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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 |
| bootblack | (noun) a person who polishes shoes and boots | Synonyms: shoeblack |
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| bootjack | (noun) has V-shaped notch for pulling off boots | - |
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| bottleneck | (noun) the narrow part of a bottle near the top | - |
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| (noun) a narrowing that reduces the flow through a channel | Synonyms: chokepoint, constriction |
| breadstick | (noun) a crisp stick-shaped roll; often served with soup | Synonyms: bread-stick |
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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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| brick | (noun) rectangular block of clay baked by the sun or in a kiln; used as a building or paving material | - |
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| (noun) a good fellow; helpful and trustworthy | - |
| broomstick | (noun) the handle of a broom | Synonyms: broom handle |
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| buck | (noun) mature male of various mammals (especially deer or antelope) | - |
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| (noun) a framework for holding wood that is being sawed | Synonyms: horse, sawbuck, sawhorse |
| (noun) a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting | Synonyms: long horse, vaulting horse |
| (noun) a piece of paper money worth one dollar | Synonyms: clam, dollar, dollar bill, one dollar bill |
| 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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| bushbuck | (noun) antelope with white markings like a harness and twisted horns | Synonyms: guib, Tragelaphus scriptus |
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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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| buyback | (noun) the act of purchasing back something previously sold | Synonyms: redemption, repurchase |
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| caipiblack | (noun) a variation of the Caipirinha made with black vodka instead of cachaça. | - |
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| callback | (noun) a request by the manufacturer of a defective product to return the product (as for replacement or repair) | Synonyms: recall |
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| calpack | (noun) a high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus | Synonyms: calpac, kalpac |
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| candlestick | (noun) a holder with sockets for candles | Synonyms: candle holder |
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| candlewick | (noun) the wick of a candle | - |
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| (noun) loops of soft yarn are cut to give a tufted pattern | - |
| canvasback | (noun) North American wild duck valued for sport and food | Synonyms: Aythya valisineria, canvasback duck |
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| carack | (noun) a large galleon sailed in the Mediterranean as a merchantman | Synonyms: carrack |
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| carrack | (noun) a large galleon sailed in the Mediterranean as a merchantman | Synonyms: carack |
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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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| cheapjack | (noun) a peddler of inferior goods | - |
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| check | (noun) the act of restraining power or action or limiting excess | Synonyms: bridle, curb |
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| (noun) obstructing an opponent in ice hockey | - |
| (noun) (chess) a direct attack on an opponent's king | - |
| (noun) the act of inspecting or verifying | Synonyms: check-out procedure, checkout |
| (noun) a textile pattern of squares or crossed lines (resembling a checkerboard) | - |
| (noun) a mark left after a small piece has been chopped or broken off of something | Synonyms: chip |
| (noun) an appraisal of the state of affairs | Synonyms: assay |
| (noun) additional proof that something that was believed (some fact or hypothesis or theory) is correct | Synonyms: confirmation, substantiation, verification |
| (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, deterrent, handicap, hinderance, hindrance, impediment |
| (noun) the bill in a restaurant | Synonyms: chit, tab |
| (noun) a mark indicating that something has been noted or completed etc. | Synonyms: check mark, tick |
| (noun) a written order directing a bank to pay money | Synonyms: bank check, cheque |
| (noun) the state of inactivity following an interruption | Synonyms: arrest, halt, hitch, stay, stop, stoppage |
| chick | (noun) young bird especially of domestic fowl | Synonyms: biddy |
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| (noun) informal terms for a (young) woman | Synonyms: bird, dame, doll, skirt, wench |
| chimneystack | (noun) the part of the chimney that is above the roof; usually has several flues | - |
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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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| chopstick | (noun) one of a pair of slender sticks used as oriental tableware to eat food with | - |
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| chuck | (noun) a holding device consisting of adjustable jaws that center a workpiece in a lathe or center a tool in a drill | - |
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| (noun) the part of a forequarter from the neck to the ribs and including the shoulder blade | - |
| (noun) informal terms for a meal | Synonyms: chow, eats, grub |
| clack | (noun) a simple valve with a hinge on one side; allows fluid to flow in only one direction | Synonyms: clack valve, clapper valve |
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| (noun) a sharp abrupt noise as if two objects hit together; may be repeated | Synonyms: clap |
| clawback | (noun) finding a way to take money back from people that they were given in another way | - |
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| click | (noun) depression of a button on a computer mouse | Synonyms: mouse click |
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| (noun) a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward | Synonyms: detent, dog, pawl |
| (noun) a stop consonant made by the suction of air into the mouth (as in Bantu) | Synonyms: suction stop |
| (noun) a short light metallic sound | Synonyms: chink, clink |
| clock | (noun) a timepiece that shows the time of day | - |
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| cluck | (noun) the sound made by a hen (as in calling her chicks) | Synonyms: clucking |
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| clusterfuck | (noun) A chaotic situation where everything seems to go wrong | - |
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| coatrack | (noun) a rack with hooks for temporarily holding coats and hats | Synonyms: coat rack, hatrack |
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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 |
| comeback | (noun) return by a celebrity to some previously successful activity | - |
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| (noun) a quick reply to a question or remark (especially a witty or critical one) | Synonyms: counter, rejoinder, replication, retort, return, riposte |
| copeck | (noun) 100 kopecks equal 1 ruble in Russia | Synonyms: kopeck, kopek |
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| cornerback | (noun) a defensive football player stationed outside the linebackers | - |
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| cottonwick | (noun) of warm Atlantic waters | Synonyms: Haemulon malanurum |
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| counterattack | (noun) an attack by a defending force against an attacking enemy force in order to regain lost ground or cut off enemy advance units etc. | Synonyms: countermove |
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| (noun) (chess) an attack that is intended to counter the opponent's advantage in another part of the board | Synonyms: counterplay |
| countercheck | (noun) something that checks the correctness of a previous check | Synonyms: double check |
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| (noun) a check that restrains another check | - |
| cowlick | (noun) a tuft of hair that grows in a different direction from the rest of the hair and usually will not lie flat | - |
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| crack | (noun) the act of cracking something | Synonyms: cracking, fracture |
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| (noun) a usually brief attempt | Synonyms: fling, go, offer, pass, whirl |
| (noun) a narrow opening | Synonyms: gap |
| (noun) a purified and potent form of cocaine that is smoked rather than snorted; highly addictive | Synonyms: crack cocaine, tornado |
| (noun) a blemish resulting from a break without complete separation of the parts | - |
| (noun) witty remark | Synonyms: quip, sally, wisecrack |
| (noun) a sudden sharp noise | Synonyms: cracking, snap |
| (noun) a long narrow cleft | Synonyms: cleft, crevice, fissure, scissure |
| (noun) a long narrow depression in a surface | Synonyms: chap, cranny, crevice, fissure |
| (noun) a chance to do something | Synonyms: shot |
| crackerjack | (noun) something excellent of its kind | Synonyms: jimdandy, jimhickey |
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| (noun) someone excellent of their kind | Synonyms: jimdandy, jimhickey |
| crick | (noun) a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British) | Synonyms: kink, rick, wrick |
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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 |
| crookback | (noun) a person whose back is hunched because of abnormal curvature of the upper spine | Synonyms: humpback, hunchback |
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| crookneck | (noun) yellow squash with a thin curved neck and somewhat warty skin | Synonyms: crookneck squash, summer crookneck |
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| crosscheck | (noun) an illegal check (chopping at an opponent's arms or stick) | - |
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| (noun) an instance of confirming something by considering information from several sources | - |
| crossjack | (noun) the lowermost sail on a mizzenmast | Synonyms: mizzen course |
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| cutback | (noun) a reduction in quantity or rate | - |
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| dabchick | (noun) small European grebe | Synonyms: little grebe, Podiceps ruficollis |
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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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| deck | (noun) any of various platforms built into a vessel | - |
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| (noun) street name for a packet of illegal drugs | - |
| (noun) a porch that resembles the deck on a ship | - |
| (noun) a pack of 52 playing cards | Synonyms: deck of cards, pack of cards |
| derrick | (noun) a simple crane having lifting tackle slung from a boom | - |
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| (noun) a framework erected over an oil well to allow drill tubes to be raised and lowered | - |
| diamondback | (noun) large deadly rattlesnake with diamond-shaped markings | Synonyms: Crotalus adamanteus, diamondback rattlesnake |
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| dick | (noun) obscene terms for penis | Synonyms: cock, pecker, prick, putz, shaft, tool |
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| (noun) someone who is a detective | Synonyms: gumshoe, hawkshaw |