| prankster | (noun) someone who plays practical jokes on others | Synonyms: cut-up, hoaxer, practical joker, tricker, trickster |
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| prater | (noun) an obnoxious and foolish and loquacious talker | Synonyms: babbler, chatterbox, chatterer, magpie, spouter |
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| presbyter | (noun) an elder in the Presbyterian Church | - |
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| presenter | (noun) person who makes a gift of property | Synonyms: bestower, conferrer, donor, giver |
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| (noun) an advocate who presents a person (as for an award or a degree or an introduction etc.) | Synonyms: sponsor |
| (noun) someone who presents a message of some sort (as a petition or an address or a check or a memorial etc.) | - |
| printer | (noun) a machine that prints | Synonyms: printing machine |
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| (noun) (computer science) an output device that prints the results of data processing | - |
| (noun) someone whose occupation is printing | Synonyms: pressman |
| prizefighter | (noun) a professional boxer | Synonyms: gladiator |
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| promoter | (noun) someone who is an active supporter and advocate | Synonyms: booster, plugger |
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| (noun) a sponsor who books and stages public entertainments | Synonyms: impresario, showman |
| prompter | (noun) a device that displays words for people to read | Synonyms: autocue |
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| (noun) someone who assists a performer by providing the next words of a forgotten speech | Synonyms: theater prompter |
| protester | (noun) someone who participates in a public display of group feeling | Synonyms: demonstrator |
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| (noun) a person who dissents from some established policy | Synonyms: contestant, dissenter, dissident, objector |
| psychrometer | (noun) a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air | - |
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| punster | (noun) someone overly fond of making puns | - |
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| punter | (noun) (football) a person who kicks the football by dropping it from the hands and contacting it with the foot before it hits the ground | - |
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| (noun) someone who bets | Synonyms: better, bettor, wagerer |
| (noun) someone who propels a boat with a pole | - |
| putter | (noun) the iron normally used on the putting green | Synonyms: putting iron |
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| (noun) a golfer who is putting | - |
| (verb) move around aimlessly | Synonyms: potter, potter around, putter around |
| (verb) do random, unplanned work or activities or spend time idly | Synonyms: mess around, monkey, monkey around, muck about, muck around, potter, tinker |
| (verb) work lightly | Synonyms: potter |
| pyrometer | (noun) a thermometer designed to measure high temperatures | - |
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| quarter | (noun) clemency or mercy shown to a defeated opponent | - |
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| (noun) the rear part of a ship | Synonyms: after part, poop, stern, tail |
| (noun) piece of leather that comprises the part of a shoe or boot covering the heel and joining the vamp | - |
| (noun) a district of a city having some distinguishing character | - |
| (noun) an unspecified person | - |
| (noun) a United States or Canadian coin worth one fourth of a dollar | - |
| (noun) one of four equal parts | Synonyms: fourth, fourth part, one-fourth, one-quarter, quartern, twenty-five percent |
| (noun) a quarter of a hundredweight (25 pounds) | - |
| (noun) a quarter of a hundredweight (28 pounds) | - |
| (noun) one of the four major division of the compass | - |
| (noun) one of four periods into which the school year is divided | - |
| (noun) (football, professional basketball) one of four divisions into which some games are divided | - |
| (noun) a fourth part of a year; three months | - |
| (noun) a unit of time equal to 15 minutes or a quarter of an hour | - |
| (verb) divide by four; divide into quarters | - |
| (verb) divide into quarters | - |
| (verb) pull (a person) apart with four horses tied to his extremities, so as to execute him | Synonyms: draw, draw and quarter |
| (verb) provide housing for (military personnel) | Synonyms: billet, canton |
| quartermaster | (noun) an army officer who provides clothing and subsistence for troops | - |
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| quester | (noun) someone making a search or inquiry | Synonyms: searcher, seeker |
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| quitter | (noun) a person who gives up too easily | - |
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| quizmaster | (noun) the host or chairman of a radio or tv quiz show or panel game | Synonyms: question master |
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| quoter | (noun) a communicator (speaker or writer) who uses quotations | - |
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| radiometer | (noun) meter to detect and measure radiant energy (electromagnetic or acoustic) | - |
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| radiomicrometer | (noun) radiometer that is extremely sensitive | - |
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| rafter | (noun) one of several parallel sloping beams that support a roof | Synonyms: balk, baulk |
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| (noun) someone who travels by raft | Synonyms: raftman, raftsman |
| (verb) provide (a ceiling) with rafters | - |
| ragsorter | (noun) a worker who sorts rags and old clothing for new uses (as in papermaking) | - |
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| rainwater | (noun) drops of fresh water that fall as precipitation from clouds | Synonyms: rain |
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| ranter | (noun) someone who rants and raves; speaks in a violent or loud manner | Synonyms: raver |
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| raster | (noun) the rectangular formation of parallel scanning lines that guide the electron beam on a television screen or a computer monitor | - |
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| ratter | (noun) any of several breeds of terrier developed to catch rats | Synonyms: rat terrier |
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| (noun) a disloyal person who betrays or deserts his cause or religion or political party or friend etc. | Synonyms: apostate, deserter, recreant, renegade, turncoat |
| rebutter | (noun) (law) a pleading by the defendant in reply to a plaintiff's surrejoinder | Synonyms: rebuttal |
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| (noun) a debater who refutes or disproves by offering contrary evidence or argument | Synonyms: confuter, disprover, refuter |
| reciter | (noun) someone who recites from memory | - |
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| reconnoiter | (verb) explore, often with the goal of finding something or somebody | Synonyms: reconnoitre, scout |
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| recruiter | (noun) an official who enlists personnel for military service | - |
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| (noun) someone who supplies members or employees | - |
| reflectometer | (noun) a meter that measures the reflectance of a surface | - |
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| refractometer | (noun) measuring instrument for measuring the refractive index of a substance | - |
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| refuter | (noun) a debater who refutes or disproves by offering contrary evidence or argument | Synonyms: confuter, disprover, rebutter |
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| register | (noun) a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device | - |
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| (noun) an air passage (usually in the floor or a wall of a room) for admitting or excluding heated air from the room | - |
| (noun) a cashbox with an adding machine to register transactions; used in shops to add up the bill | Synonyms: cash register |
| (noun) (computer science) memory device that is the part of computer memory that has a specific address and that is used to hold information of a specific kind | - |
| (noun) (music) the timbre that is characteristic of a certain range and manner of production of the human voice or of different pipe organ stops or of different musical instruments | - |
| (noun) an official written record of names or events or transactions | Synonyms: registry |
| (noun) a book in which names and transactions are listed | - |
| (verb) enter into someone's consciousness | - |
| (verb) indicate a certain reading; of gauges and instruments | Synonyms: read, record, show |
| (verb) record in a public office or in a court of law | Synonyms: file |
| (verb) send by registered mail | - |
| (verb) manipulate the registers of an organ | - |
| (verb) be aware of | Synonyms: record |
| (verb) show in one's face | - |
| (verb) record in writing; enter into a book of names or events or transactions | - |
| (verb) enroll to vote | - |
| (verb) have one's name listed as a candidate for several parties | Synonyms: cross-file |
| renter | (noun) someone who pays rent to use land or a building or a car that is owned by someone else | Synonyms: tenant |
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| (noun) an owner of property who receives payment for its use by another person | - |
| repeater | (noun) a firearm that can fire several rounds without reloading | Synonyms: repeating firearm |
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| (noun) (electronics) electronic device that amplifies a signal before transmitting it again | - |
| (noun) a person who repeats | - |
| (noun) someone who is repeatedly arrested for criminal behavior (especially for the same criminal behavior) | Synonyms: habitual criminal, recidivist |
| reporter | (noun) a person who investigates and reports or edits news stories | Synonyms: newsperson |
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| requester | (noun) one praying humbly for something | Synonyms: petitioner, suppliant, supplicant |
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| resister | (noun) someone who systematically obstructs some action that others want to take | Synonyms: obstructer, obstructionist, obstructor, thwarter |
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| (noun) someone who offers opposition | Synonyms: adversary, antagonist, opponent, opposer |
| respecter | (noun) a person who respects someone or something; usually used in the negative | - |
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| restauranter | (noun) the proprietor of a restaurant | Synonyms: restaurateur |
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| rester | (noun) a person who rests | - |
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| rewriter | (noun) someone who puts text into appropriate form for publication | Synonyms: redact, redactor, reviser, rewrite man |
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| rheometer | (noun) an instrument for measuring the flow of liquids (especially arterial blood) | - |
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| rhymester | (noun) a writer who composes rhymes; a maker of poor verses (usually used as terms of contempt for minor or inferior poets) | Synonyms: poetiser, poetizer, rhymer, versifier |
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| ringmaster | (noun) the person in charge of performances in a circus ring | - |
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| rioter | (noun) troublemaker who participates in a violent disturbance of the peace; someone who rises up against the constituted authority | - |
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| riveter | (noun) a machine for driving rivets | Synonyms: riveting machine, rivetter |
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| (noun) a worker who inserts and hammers rivets | Synonyms: rivetter |
| rivetter | (noun) a machine for driving rivets | Synonyms: riveter, riveting machine |
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| (noun) a worker who inserts and hammers rivets | Synonyms: riveter |
| roadster | (noun) a small lightweight carriage; drawn by a single horse | Synonyms: buggy |
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| (noun) an open automobile having a front seat and a rumble seat | Synonyms: runabout, two-seater |
| roaster | (noun) a special cooking pan for roasting | - |
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| (noun) flesh of a large young chicken over 3 1/2 lb suitable for roasting | - |
| (noun) a cook who roasts food | - |
| (noun) a harsh or humorous critic (sometimes intended as a facetious compliment) | - |
| roister | (verb) engage in boisterous, drunken merrymaking | Synonyms: carouse, riot |
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| rooster | (noun) adult male chicken | Synonyms: cock |
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| rooter | (noun) an enthusiastic devotee of sports | Synonyms: fan, sports fan |
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| roster | (noun) a list of names | Synonyms: roll |
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| rotter | (noun) a person who is deemed to be despicable or contemptible | Synonyms: bum, crumb, dirty dog, git, lowlife, puke, rat, scum bag, scumbag, skunk, so-and-so, stinker, stinkpot |
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| router | (noun) (computer science) a device that forwards data packets between computer networks | - |
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| (noun) a worker who routes shipments for distribution and delivery | - |
| (noun) a power tool with a shaped cutter; used in carpentry for cutting grooves | - |
| salinometer | (noun) a hydrometer that determines the concentration of salt solutions by measuring their density | - |
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| salter | (noun) someone who makes or deals in salt | Synonyms: salt merchant |
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| (noun) someone who uses salt to preserve meat or fish or other foods | - |
| saltpeter | (noun) (KNO3) used especially as a fertilizer and explosive | Synonyms: niter, nitre, potassium nitrate, saltpetre |
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| saltwater | (noun) water containing salts | Synonyms: brine, seawater |
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| saluter | (noun) a person who greets | Synonyms: greeter, welcomer |
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| sandblaster | (noun) a tool that throws out a blast of steam laden with sand; used to clean or grind hard surfaces | - |
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| saunter | (noun) a leisurely walk (usually in some public place) | Synonyms: amble, perambulation, promenade, stroll |
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| (noun) a careless leisurely gait | - |
| (verb) walk leisurely and with no apparent aim | Synonyms: stroll |
| scatter | (noun) the act of scattering | Synonyms: scattering, strewing |
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| (noun) a haphazard distribution in all directions | Synonyms: spread |
| (verb) cause to separate | Synonyms: break up, disperse |
| (verb) distribute loosely | Synonyms: disperse, dot, dust, sprinkle |
| (verb) sow by scattering | - |
| (verb) move away from each other | Synonyms: disperse, dissipate, spread out |
| (verb) to cause to separate and go in different directions | Synonyms: break up, dispel, disperse, dissipate |
| (verb) strew or distribute over an area | Synonyms: spread, spread out |
| sceneshifter | (noun) a stagehand responsible for moving scenery | Synonyms: shifter |
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| scepter | (noun) a ceremonial or emblematic staff | Synonyms: sceptre, verge, wand |
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| (noun) the imperial authority symbolized by a scepter | Synonyms: sceptre |
| schlockmeister | (noun) (slang) a merchant who deals in shoddy or inferior merchandise | Synonyms: shlockmeister |
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| schoolmaster | (noun) food fish of warm Caribbean and Atlantic waters | Synonyms: Lutjanus apodus |
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| (noun) presiding officer of a school | Synonyms: headmaster, master |
| (noun) any person (or institution) who acts as an educator | - |
| scienter | (adverb) (law) deliberately or knowingly | - |
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| sclerometer | (noun) a measuring instrument that measures the hardness of materials by penetrating them with a stylus that has a diamond point | - |
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| scooter | (noun) large black diving duck of northern parts of the Northern Hemisphere | Synonyms: scoter |
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| (noun) child's two-wheeled vehicle operated by foot | - |
| (noun) a wheeled vehicle with small wheels and a low-powered gasoline engine geared to the rear wheel | Synonyms: motor scooter |
| (noun) a sailing vessel with runners and a cross-shaped frame; suitable for traveling over ice | Synonyms: ice yacht, iceboat |
| (noun) a motorboat resembling a motor scooter | Synonyms: sea scooter, water scooter |
| scoter | (noun) large black diving duck of northern parts of the Northern Hemisphere | Synonyms: scooter |
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| scouter | (noun) an adult member of the Boy Scouts movement | Synonyms: rover |
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| scoutmaster | (noun) the leader of a troop of Scouts | - |
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| screenwriter | (noun) someone who writes screenplays | Synonyms: film writer |
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| scriptwriter | (noun) someone who writes scripts for plays or movies or broadcast dramas | - |
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| seamster | (noun) a person whose occupation is making and altering garments | Synonyms: sartor, tailor |
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| seawater | (noun) water containing salts | Synonyms: brine, saltwater |
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| secreter | (noun) any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream | Synonyms: gland, secretor, secretory organ |
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| semester | (noun) one of two divisions of an academic year | - |
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| (noun) half a year; a period of 6 months | - |
| semidiameter | (noun) the apparent radius of a celestial body when viewed as a disc from the earth | - |
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| sensitometer | (noun) a measuring instrument for measuring the light sensitivity of film over a range of exposures | - |
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| sequester | (verb) keep away from others | Synonyms: seclude, sequestrate, withdraw |
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| (verb) set apart from others | Synonyms: isolate, keep apart, sequestrate, set apart |
| (verb) undergo sequestration by forming a stable compound with an ion | - |
| (verb) take temporary possession of as a security, by legal authority | Synonyms: attach, confiscate, impound, seize |
| (verb) requisition forcibly, as of enemy property | - |
| setter | (noun) a long-haired dog formerly trained to crouch on finding game but now to point | - |
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| (noun) one who sets written material into type | Synonyms: compositor, typesetter, typographer |
| sharpshooter | (noun) a fast schooner once used by New England fisherman for illegal fishing in Canadian waters | - |
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| (noun) someone skilled in shooting | Synonyms: crack shot, marksman |
| (noun) an athlete noted for accurate aim | - |
| shatter | (verb) break into many pieces | - |
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| (verb) cause to break into many pieces | - |
| (verb) damage or destroy | - |
| shearwater | (noun) long-winged oceanic bird that in flight skims close to the waves | - |
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| shelter | (noun) a structure that provides privacy and protection from danger | - |
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| (noun) protective covering that provides protection from the weather | - |
| (noun) temporary housing for homeless or displaced persons | - |
| (noun) a way of organizing business to reduce the taxes it must pay on current earnings | Synonyms: tax shelter |
| (noun) the condition of being protected | Synonyms: protection |
| (verb) invest (money) so that it is not taxable | - |
| (verb) provide shelter for | - |
| shifter | (noun) a mechanical device for engaging and disengaging gears | Synonyms: gear lever, gearshift, gearstick |
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| (noun) a stagehand responsible for moving scenery | Synonyms: sceneshifter |
| shinplaster | (noun) paper money of little value issued on insufficient security | - |
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| shirtlifter | (noun) a homosexual man | Synonyms: gay man |
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| shirtwaister | (noun) a blouse with buttons down the front | Synonyms: shirtwaist |
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| shitter | (noun) a person who defecates | Synonyms: defecator, voider |
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| shlockmeister | (noun) (slang) a merchant who deals in shoddy or inferior merchandise | Synonyms: schlockmeister |
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| shooter | (noun) a large marble used for shooting in the game of marbles | Synonyms: taw |
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| (noun) a person who shoots (usually with respect to their ability to shoot) | Synonyms: shot |
| (noun) a professional killer who uses a gun | Synonyms: gun, gun for hire, gunman, gunslinger, hired gun, hit man, hitman, torpedo, triggerman |
| (noun) (sports) a player who drives or kicks a ball at the goal (or a basketball player who shoots at the basket) | - |
| (noun) a gambler who throws dice in the game of craps | Synonyms: crap-shooter |
| shoplifter | (noun) a thief who steals goods that are in a store | Synonyms: booster, lifter |
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| shouter | (noun) someone who communicates vocally in a very loud voice | Synonyms: bawler, bellower, roarer, screamer, screecher, yeller |
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