| shunter | (noun) a small locomotive used to move cars around but not to make trips | - |
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| shutter | (noun) a hinged blind for a window | - |
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| (noun) a mechanical device on a camera that opens and closes to control the time of a photographic exposure | - |
| (verb) close with shutters | - |
| shyster | (noun) a person (especially a lawyer or politician) who uses unscrupulous or unethical methods | Synonyms: pettifogger |
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| sidesplitter | (noun) a joke that seems extremely funny | Synonyms: belly laugh, howler, riot, scream, thigh-slapper, wow |
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| sifter | (noun) a household sieve (as for flour) | - |
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| sinister | (adjective) threatening or foreshadowing evil or tragic developments | Synonyms: baleful, forbidding, menacing, minacious, minatory, ominous, threatening |
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| (adjective) stemming from evil characteristics or forces; wicked or dishonorable | Synonyms: black, dark |
| (adjective) on or starting from the wearer's left | - |
| sinter | (verb) cause (ores or powdery metals) to become a coherent mass by heating without melting | - |
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| sister | (noun) a female person who has the same parents as another person | Synonyms: sis |
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| (noun) a female person who is a fellow member of a sorority or labor union or other group | - |
| sitter | (noun) a domestic hen ready to brood | Synonyms: brood hen, broody, broody hen, setting hen |
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| (noun) a person engaged to care for children when the parents are not home | Synonyms: baby-sitter, babysitter |
| (noun) an organism (person or animal) that sits | - |
| (noun) a person who poses for a painter or sculptor | Synonyms: artist's model |
| skater | (noun) someone who skates | - |
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| skitter | (verb) twitch the hook of a fishing line through or along the surface of water | - |
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| (verb) cause to skip over a surface | Synonyms: skim, skip |
| (verb) to move about or proceed hurriedly | Synonyms: scamper, scurry, scuttle |
| (verb) glide easily along a surface | - |
| slater | (noun) any of various small terrestrial isopods having a flat elliptical segmented body; found in damp habitats | Synonyms: wood louse, woodlouse |
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| slaughter | (noun) the killing of animals (as for food) | - |
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| (noun) the savage and excessive killing of many people | Synonyms: butchery, carnage, mass murder, massacre |
| (noun) a sound defeat | Synonyms: debacle, drubbing, thrashing, trouncing, walloping, whipping |
| (verb) kill a large number of people indiscriminately | Synonyms: massacre, mow down |
| (verb) kill (animals) usually for food consumption | Synonyms: butcher |
| smatter | (verb) speak with spotty or superficial knowledge | - |
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| (verb) to talk foolishly | Synonyms: babble, blather, blether, blither |
| (verb) work with in an amateurish manner | Synonyms: dabble, play around |
| smelter | (noun) an industrial plant for smelting | Synonyms: smeltery |
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| snifter | (noun) a globular glass with a small top; used for serving brandy | Synonyms: brandy glass, brandy snifter |
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| snorter | (noun) something that is extraordinary or remarkable or prominent | - |
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| (noun) something outstandingly difficult | - |
| (noun) someone who expresses contempt or indignation by uttering a snorting sound | - |
| sodbuster | (noun) a person who operates a farm | Synonyms: farmer, granger, husbandman |
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| solenogaster | (noun) deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle | Synonyms: aplacophoran |
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| songster | (noun) any bird having a musical call | Synonyms: songbird |
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| (noun) a person who sings with skill | - |
| (noun) a composer of words or music for popular songs | Synonyms: ballad maker, songwriter |
| songwriter | (noun) a composer of words or music for popular songs | Synonyms: ballad maker, songster |
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| sonometer | (noun) an instrument used to measure the sensitivity of hearing | Synonyms: audiometer |
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| sorter | (noun) a machine for sorting things (such as punched cards or letters) into classes | - |
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| (noun) a clerk who sorts things (as letters at the post office) | - |
| southeaster | (noun) a strong wind from the southeast | Synonyms: sou'easter |
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| southwester | (noun) a strong wind from the southwest | Synonyms: sou'wester |
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| spatter | (noun) the act of splashing a (liquid) substance on a surface | Synonyms: spattering, splash, splashing, splattering |
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| (noun) the noise of something spattering or sputtering explosively | Synonyms: spattering, splatter, splattering, splutter, sputter, sputtering |
| (verb) dash a liquid upon or against | Synonyms: plash, splash, splatter, splosh, swash |
| (verb) spot, splash, or soil | Synonyms: bespatter |
| (verb) rain gently | Synonyms: patter, pitter-patter, spit, sprinkle |
| specter | (noun) a mental representation of some haunting experience | Synonyms: ghost, shade, spectre, spook, wraith |
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| (noun) a ghostly appearing figure | Synonyms: apparition, fantasm, phantasm, phantasma, phantom, spectre |
| spectrometer | (noun) spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer | Synonyms: mass spectrometer |
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| spectrophotometer | (noun) a photometer for comparing two light radiations wavelength by wavelength | - |
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| speechwriter | (noun) a writer who composes speeches for others to deliver | - |
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| speedometer | (noun) a meter fixed to a vehicle that measures and displays its speed | Synonyms: speed indicator |
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| speedskater | (noun) an ice-skater who races competitively; usually around an oval course | Synonyms: speed skater |
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| spelter | (noun) impure zinc containing about three percent lead and other impurities (especially in the form of ingots) | - |
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| spherometer | (noun) a measuring instrument for measuring the curvature of a surface | - |
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| sphincter | (noun) a ring of muscle that contracts to close an opening | Synonyms: anatomical sphincter, sphincter muscle |
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| sphygmomanometer | (noun) a pressure gauge for measuring blood pressure | - |
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| spinmeister | (noun) a public relations person who tries to forestall negative publicity by publicizing a favorable interpretation of the words or actions of a company or political party or famous person | Synonyms: spin doctor |
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| spinster | (noun) an elderly unmarried woman | Synonyms: old maid |
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| (noun) someone who spins (who twists fibers into threads) | Synonyms: spinner, thread maker |
| spirometer | (noun) a measuring instrument for measuring the vital capacity of the lungs | - |
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| spitter | (noun) an illegal pitch in which a foreign substance (spit or Vaseline) is applied to the ball by the pitcher before he throws it | Synonyms: spitball |
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| (noun) a person who spits (ejects saliva or phlegm from the mouth) | Synonyms: expectorator |
| splatter | (noun) the noise of something spattering or sputtering explosively | Synonyms: spatter, spattering, splattering, splutter, sputter, sputtering |
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| (noun) a small quantity of something moist or liquid | Synonyms: dab, splash |
| (verb) cause or allow (a liquid substance) to run or flow from a container | Synonyms: slop, spill |
| (verb) dash a liquid upon or against | Synonyms: plash, spatter, splash, splosh, swash |
| splinter | (noun) a small thin sharp bit of wood or glass or metal | Synonyms: sliver |
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| (verb) break up into splinters or slivers | Synonyms: sliver |
| (verb) withdraw from an organization or communion | Synonyms: break away, secede |
| (verb) divide into slivers or splinters | Synonyms: sliver |
| splitter | (noun) a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics | Synonyms: divider |
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| (noun) a worker who splits fish and removes the backbone | - |
| (noun) a laborer who splits logs to build split-rail fences | Synonyms: rail-splitter |
| splutter | (noun) an utterance (of words) with spitting sounds (as in rage) | Synonyms: sputter |
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| (noun) the noise of something spattering or sputtering explosively | Synonyms: spatter, spattering, splatter, splattering, sputter, sputtering |
| (verb) spit up in an explosive manner | Synonyms: spit out, sputter |
| (verb) utter with a spitting sound, as if in a rage | Synonyms: sputter |
| sportscaster | (noun) an announcer who reads sports news or describes sporting events | Synonyms: sports announcer, sports commentator |
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| sportswriter | (noun) a journalist who writes about sports | Synonyms: sports writer |
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| spotter | (noun) someone who is the first to observe something | Synonyms: discoverer, finder |
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| (noun) a worker employed to apply spots (as markers or identifiers) | - |
| (noun) a worker employed at a dry-cleaning establishment to remove spots | - |
| (noun) a person employed to keep watch for some anticipated event | Synonyms: lookout, lookout man, picket, scout, sentinel, sentry, watch |
| spouter | (noun) a spouting whale | - |
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| (noun) an oil well that is spouting | - |
| (noun) an obnoxious and foolish and loquacious talker | Synonyms: babbler, chatterbox, chatterer, magpie, prater |
| sprinter | (noun) someone who runs a short distance at top speed | - |
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| sprouter | (noun) A device for sprouting seeds. | Synonyms: seed sprouter |
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| sputter | (noun) an utterance (of words) with spitting sounds (as in rage) | Synonyms: splutter |
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| (noun) the noise of something spattering or sputtering explosively | Synonyms: spatter, spattering, splatter, splattering, splutter, sputtering |
| (verb) spit up in an explosive manner | Synonyms: spit out, splutter |
| (verb) cause to undergo a process in which atoms are removed | - |
| (verb) utter with a spitting sound, as if in a rage | Synonyms: splutter |
| (verb) climb awkwardly, as if by scrambling | Synonyms: clamber, scramble, shin, shinny, skin, struggle |
| (verb) make an explosive sound | - |
| spymaster | (noun) someone who directs clandestine intelligence activities | - |
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| squatter | (noun) someone who settles on land without right or title | - |
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| (noun) someone who settles lawfully on government land with the intent to acquire title to it | Synonyms: homesteader, nester |
| squinter | (noun) a person with strabismus | Synonyms: squint-eye |
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| squirter | (noun) plaything consisting of a toy pistol that squirts water | Synonyms: squirt gun, water gun, water pistol |
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| stactometer | (noun) a device for investigating surface tension using the stalagmometric method. | Synonyms: stalagmometer, stalogometer |
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| stalagmometer | (noun) a device for investigating surface tension using the stalagmometric method. | Synonyms: stactometer, stalogometer |
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| stalogometer | (noun) a device for investigating surface tension using the stalagmometric method. | Synonyms: stactometer, stalagmometer |
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| starter | (noun) a culture containing yeast or bacteria that is used to start the process of fermentation or souring in making butter or cheese or dough | - |
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| (noun) a hand tool consisting of a rotating shaft with parallel handle | Synonyms: crank |
| (noun) an electric motor for starting an engine | Synonyms: starter motor, starting motor |
| (noun) food or drink to stimulate the appetite (usually served before a meal or as the first course) | Synonyms: appetiser, appetizer |
| (noun) any new participant in some activity | Synonyms: entrant, fledgeling, fledgling, freshman, neophyte, newbie, newcomer |
| (noun) the official who signals the beginning of a race or competition | Synonyms: dispatcher |
| (noun) a contestant in a team sport who is in the game at the beginning | - |
| stater | (noun) a resident of a particular state or group of states | - |
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| (noun) any of the various silver or gold coins of ancient Greece | - |
| stationmaster | (noun) the person in charge of a railway station | Synonyms: station agent |
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| steamfitter | (noun) a craftsman who installs and maintains equipment for ventilating or heating or refrigerating | - |
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| stepdaughter | (noun) a daughter of your spouse by a former marriage | - |
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| stepsister | (noun) a sister who has only one parent in common with you | Synonyms: half-sister, half sister |
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| stinter | (noun) an economizer who stints someone with something | - |
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| stonecutter | (noun) someone who cuts or carves stone | Synonyms: cutter |
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| stutter | (noun) a speech disorder involving hesitations and involuntary repetitions of certain sounds | Synonyms: stammer |
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| (verb) speak haltingly | Synonyms: bumble, falter, stammer |
| submitter | (noun) someone who submits something (as an application for a job or a manuscript for publication etc.) for the judgment of others | - |
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| (noun) someone who yields to the will of another person or force | - |
| subsister | (noun) one who lives through affliction | Synonyms: survivor |
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| subtracter | (noun) a machine that subtracts numbers | - |
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| (noun) a person who subtracts numbers | - |
| subverter | (noun) a radical supporter of political or social revolution | Synonyms: revolutionary, revolutionist, subversive |
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| suggester | (noun) someone who advances a suggestion or proposal | Synonyms: proposer |
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| summercater | (noun) (Maine colloquial) a temporary summer resident of Maine | Synonyms: sport |
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| sumpter | (noun) an animal (such as a mule or burro or horse) used to carry loads | Synonyms: pack animal |
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| supercomputer | (noun) a mainframe computer that is one of the most powerful available at a given time | - |
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| supermarketer | (noun) an operator of a supermarket | Synonyms: supermarketeer |
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| supertwister | (noun) the most powerful tornado which can create enormously devastating damage | - |
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| supplanter | (noun) one who wrongfully or illegally seizes and holds the place of another | Synonyms: usurper |
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| supporter | (noun) a band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve) | Synonyms: garter |
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| (noun) a support for the genitals worn by men engaging in strenuous exercise | Synonyms: athletic supporter, jock, jockstrap, suspensor |
| (noun) a person who backs a politician or a team etc. | Synonyms: admirer, booster, champion, friend, protagonist |
| (noun) a person who contributes to the fulfillment of a need or furtherance of an effort or purpose | Synonyms: assistant, help, helper |
| (noun) someone who supports or champions something | Synonyms: patron, sponsor |
| surmounter | (noun) someone who overcomes and establishes ascendancy and control by force or persuasion | Synonyms: overcomer, subduer |
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| surrebutter | (noun) (law) a pleading by the plaintiff in reply to the defendant's rebutter | Synonyms: surrebuttal |
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| swatter | (noun) an implement with a flat part (of mesh or plastic) and a long handle; used to kill insects | Synonyms: flyswat, flyswatter |
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| (verb) splash and flutter about in or as if in water | - |
| sweater | (noun) a crocheted or knitted garment covering the upper part of the body | Synonyms: jumper |
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| (noun) a person who perspires | Synonyms: perspirer |
| swelter | (verb) suffer from intense heat | - |
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| (verb) be uncomfortably hot | - |
| tacheometer | (noun) a theodolite designed for rapid measurements | Synonyms: tachymeter |
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| tachometer | (noun) measuring instrument for indicating speed of rotation | Synonyms: tach |
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| tachymeter | (noun) a theodolite designed for rapid measurements | Synonyms: tacheometer |
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| tailgater | (noun) a driver who follows too closely behind another motor vehicle | - |
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| tapster | (noun) a tavern keeper who taps kegs or casks | Synonyms: tapper |
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| taskmaster | (noun) someone who imposes hard or continuous work | - |
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| taster | (noun) someone who samples food or drink for its quality | Synonyms: sampler, taste-tester, taste tester |
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| tater | (noun) an edible tuber native to South America; a staple food of Ireland | Synonyms: Irish potato, murphy, potato, spud, white potato |
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| tatter | (noun) a small piece of cloth | Synonyms: rag, shred, tag, tag end |
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| taximeter | (noun) a meter in a taxi that registers the fare (based on the length of the ride) | - |
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| teamster | (noun) someone who drives a truck as an occupation | Synonyms: truck driver, trucker |
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| (noun) the driver of a team of horses doing hauling | - |
| teeter | (noun) a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end | Synonyms: dandle board, seesaw, teeter-totter, teeterboard, teetertotter, tilting board |
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| (verb) move unsteadily, with a rocking motion | Synonyms: seesaw, totter |
| teetertotter | (noun) a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end | Synonyms: dandle board, seesaw, teeter-totter, teeter, teeterboard, tilting board |
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| (verb) ride on a plank | Synonyms: seesaw, teeter-totter |
| telecaster | (noun) a television broadcaster | - |
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| telemeter | (noun) any scientific instrument for observing events at a distance and transmitting the information back to the observer | - |
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| teleprinter | (noun) a character printer connected to a telegraph that operates like a typewriter | Synonyms: teletype machine, teletypewriter, telex, telex machine |
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