| ackee | (noun) red pear-shaped tropical fruit with poisonous seeds; flesh is poisonous when unripe or overripe | Synonyms: akee |
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| attacker | (noun) someone who attacks | Synonyms: aggressor, assailant, assaulter |
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| backer | (noun) someone who provides financial support for some venture | Synonyms: angel |
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| backpacker | (noun) a hiker who wears a backpack | Synonyms: packer |
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| blackening | (noun) changing to a darker color | Synonyms: darkening |
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| bluejacket | (noun) a serviceman in the navy | Synonyms: navy man, sailor, sailor boy |
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| bracken | (noun) large coarse fern often several feet high; essentially weed ferns; cosmopolitan | Synonyms: brake, pasture brake, Pteridium aquilinum |
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| (noun) fern of southeastern Asia; not hardy in cold temperate regions | Synonyms: Pteridium esculentum |
| bracket | (noun) a support projecting from a wall (as to hold a shelf) | Synonyms: wall bracket |
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| (noun) either of two punctuation marks ([ or ]) used to enclose textual material | Synonyms: square bracket |
| (noun) either of two punctuation marks (`<' or `>') used in computer programming and sometimes used to enclose textual material | Synonyms: angle bracket |
| (noun) a category falling within certain defined limits | - |
| bushwhacker | (noun) a disparaging term for an unsophisticated person | Synonyms: hillbilly |
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| (noun) a Confederate guerrilla during the American Civil War | - |
| cracker | (noun) a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends | Synonyms: cracker bonbon, snapper |
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| (noun) firework consisting of a small explosive charge and fuse in a heavy paper casing | Synonyms: banger, firecracker |
| (noun) a thin crisp wafer made of flour and water with or without leavening and shortening; unsweetened or semisweet | - |
| (noun) a poor White person in the southern United States | Synonyms: redneck |
| (noun) a programmer who cracks (gains unauthorized access to) computers, typically to do malicious things | - |
| crackerberry | (noun) creeping perennial herb distinguished by red berries and clustered leaf whorls at the tips of shoots; Greenland to Alaska | Synonyms: bunchberry, Cornus canadensis, dwarf cornel, pudding berry |
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| crackerjack | (noun) something excellent of its kind | Synonyms: jimdandy, jimhickey |
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| (noun) someone excellent of their kind | Synonyms: jimdandy, jimhickey |
| firecracker | (noun) firework consisting of a small explosive charge and fuse in a heavy paper casing | Synonyms: banger, cracker |
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| gimcrackery | (noun) ornamental objects of no great value | Synonyms: falderol, folderal, frill, gimcrack, nonsense, trumpery |
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| hackee | (noun) small striped semiterrestrial eastern American squirrel with cheek pouches | Synonyms: eastern chipmunk, ground squirrel, striped squirrel, Tamias striatus |
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| hacker | (noun) one who works hard at boring tasks | Synonyms: drudge, hack |
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| (noun) a programmer for whom computing is its own reward; may enjoy the challenge of breaking into other computers but does no harm | - |
| (noun) someone who plays golf poorly | - |
| highjacker | (noun) a holdup man who stops a vehicle and steals from it | Synonyms: highwayman, hijacker, road agent |
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| (noun) someone who uses force to take over a vehicle (especially an airplane) in order to reach an alternative destination | Synonyms: hijacker |
| hijacker | (noun) a holdup man who stops a vehicle and steals from it | Synonyms: highjacker, highwayman, road agent |
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| (noun) someone who uses force to take over a vehicle (especially an airplane) in order to reach an alternative destination | Synonyms: highjacker |
| jacket | (noun) a short coat | - |
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| (noun) an outer wrapping or casing | - |
| (noun) (dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth | Synonyms: cap, crown, crownwork, jacket crown |
| (noun) the tough metal shell casing for certain kinds of ammunition | - |
| (noun) the outer skin of a potato | - |
| knacker | (noun) someone who buys up old horses for slaughter | - |
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| (noun) someone who buys old buildings or ships and breaks them up to recover the materials in them | - |
| knickknackery | (noun) miscellaneous curios | Synonyms: bric-a-brac, knickknack, nicknack, whatnot |
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| lackey | (noun) a male servant (especially a footman) | Synonyms: flunkey, flunky |
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| (noun) a person who tries to please someone in order to gain a personal advantage | Synonyms: ass-kisser, crawler, sycophant, toady |
| leatherjacket | (noun) any of several brightly colored tropical filefishes | Synonyms: leatherfish |
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| (noun) any of several New World tropical fishes having tiny embedded scales | Synonyms: leatherjack |
| (noun) tough-skinned larva of certain crane flies | - |
| linebacker | (noun) (American football) the position of a defensive football player who plays close behind the line of scrimmage | Synonyms: line backer |
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| (noun) a defensive football player who takes a position close behind the linemen | Synonyms: line backer |
| mackerel | (noun) any of various fishes of the family Scombridae | - |
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| (noun) flesh of very important usually small (to 18 in) fatty Atlantic fish | - |
| nutcracker | (noun) speckled birds that feed on nuts | - |
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| (noun) any of various small short-tailed songbirds with strong feet and a sharp beak that feed on small nuts and insects | Synonyms: nuthatch |
| (noun) a compound lever used to crack nuts open | - |
| packer | (noun) a workman employed to pack things into containers | Synonyms: bagger, boxer |
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| (noun) a wholesaler in the meat-packing business | Synonyms: meat packer |
| (noun) a hiker who wears a backpack | Synonyms: backpacker |
| packet | (noun) a small package or bundle | - |
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| (noun) a boat for carrying mail | Synonyms: mail boat, mailboat, packet boat |
| (noun) (computer science) a message or message fragment | - |
| (noun) a collection of things wrapped or boxed together | Synonyms: bundle, package, parcel |
| placket | (noun) a piece of cloth sewn under an opening | - |
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| quackery | (noun) medical practice and advice based on observation and experience in ignorance of scientific findings | Synonyms: empiricism |
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| (noun) the dishonesty of a charlatan | Synonyms: charlatanism |
| racker | (noun) an attendant who puts pool or billiard balls into a rack | - |
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| racket | (noun) an illegal enterprise (such as extortion or fraud or drug peddling or prostitution) carried on for profit | Synonyms: fraudulent scheme, illegitimate enterprise |
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| (noun) a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games | Synonyms: racquet |
| (noun) the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience | Synonyms: dissonance, noise |
| (noun) a loud and disturbing noise | - |
| racketeer | (noun) someone who commits crimes for profit (especially one who obtains money by fraud or extortion) | - |
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| racketeering | (noun) engaging in a racket | - |
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| racketiness | (noun) the auditory effect characterized by loud and constant noise | Synonyms: noisiness |
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| safecracker | (noun) a thief who breaks open safes to steal valuable contents | Synonyms: cracksman, safebreaker |
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| slackening | (noun) an occurrence of control or strength weakening | Synonyms: loosening, relaxation |
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| slacker | (noun) a person who shirks his work or duty (especially one who tries to evade military service in wartime) | Synonyms: shirker |
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| smacker | (noun) a loud kiss | - |
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| (noun) a very powerful blow with the fist | - |
| snacker | (noun) someone who eats lightly or eats snacks between meals | Synonyms: nosher |
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| stacker | (noun) a laborer who builds up a stack or pile | - |
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| straightjacket | (noun) a garment similar to a jacket that is used to bind the arms tightly against the body as a means of restraining a violent person | Synonyms: straitjacket |
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| straitjacket | (noun) a garment similar to a jacket that is used to bind the arms tightly against the body as a means of restraining a violent person | Synonyms: straightjacket |
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| (noun) anything immaterial that severely hinders or confines | - |
| tacker | (noun) a hand-held machine for driving staples home | Synonyms: staple gun, staplegun |
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| (noun) a sewer who fastens a garment with long loose stitches | Synonyms: baster |
| (noun) a worker who fastens things by tacking them (as with tacks or by spotwelding) | - |
| tracker | (noun) someone who tracks down game | - |
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| whacker | (noun) something especially big or impressive of its kind | Synonyms: whopper |
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