| speedily | (adverb) with speed | Synonyms: apace, chop-chop, in short order, quickly, rapidly |
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| speediness | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidity, rapidness |
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| speeding | (noun) changing location rapidly | Synonyms: hurrying, speed |
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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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| speedpaint | (noun) Painting a picture in a very short amount of time | - |
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| speedskater | (noun) an ice-skater who races competitively; usually around an oval course | Synonyms: speed skater |
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| speedup | (noun) the act of accelerating; increasing the speed | Synonyms: acceleration, quickening |
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| speedway | (noun) a racetrack for racing automobiles or motorcycles | - |
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| (noun) road where high speed driving is allowed | - |
| speedwell | (noun) any plant of the genus Veronica | Synonyms: veronica |
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| speedy | (adjective) characterized by speed; moving with or capable of moving with high speed | Synonyms: rapid |
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| (adjective) accomplished rapidly and without delay | Synonyms: quick |
| spelaeologist | (noun) a person who explores caves | Synonyms: potholer, speleologist, spelunker |
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| spelaeology | (noun) the pastime of exploring caves | Synonyms: speleology |
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| (noun) the scientific study of caves | Synonyms: speleology |
| speleologist | (noun) a person who explores caves | Synonyms: potholer, spelaeologist, spelunker |
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| speleology | (noun) the pastime of exploring caves | Synonyms: spelaeology |
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| (noun) the scientific study of caves | Synonyms: spelaeology |
| spell | (noun) a verbal formula believed to have magical force | Synonyms: charm, magic spell, magical spell |
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| (noun) a psychological state induced by (or as if induced by) a magical incantation | Synonyms: enchantment, trance |
| (noun) a time period for working (after which you will be relieved by someone else) | Synonyms: go, tour, turn |
| (noun) a period of indeterminate length (usually short) marked by some action or condition | Synonyms: patch, piece, while |
| (verb) take turns working | - |
| (verb) orally recite the letters of or give the spelling of | Synonyms: spell out |
| (verb) indicate or signify | Synonyms: import |
| (verb) place under a spell | - |
| (verb) write or name the letters that comprise the conventionally accepted form of (a word or part of a word) | Synonyms: write |
| (verb) relieve (someone) from work by taking a turn | - |
| spellbind | (verb) put into a trance | Synonyms: entrance |
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| (verb) attract strongly, as if with a magnet | Synonyms: bewitch, magnetise, magnetize, mesmerise, mesmerize |
| (verb) to render motionless, as with a fixed stare or by arousing terror or awe | Synonyms: fascinate, grip, transfix |
| spellbinder | (noun) an orator who can hold his listeners spellbound | - |
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| spellbinding | (adjective) attracting and holding interest as if by a spell | Synonyms: hypnotic, mesmeric, mesmerizing |
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| spellbound | (adjective) having your attention fixated as though by a spell | Synonyms: fascinated, hypnotised, hypnotized, mesmerised, mesmerized, spell-bound, transfixed |
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| spelldown | (noun) a contest in which you are eliminated if you fail to spell a word correctly | Synonyms: spelling bee, spelling contest |
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| speller | (noun) an introductory textbook to teach spelling | - |
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| (noun) someone who spells words | Synonyms: good speller, poor speller |
| spelling | (noun) forming words with letters according to the principles underlying accepted usage | - |
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| spelt | (noun) hardy wheat grown mostly in Europe for livestock feed | Synonyms: Triticum aestivum spelta, Triticum spelta |
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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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| spelunk | (verb) explore natural caves | Synonyms: cave |
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| spelunker | (noun) a person who explores caves | Synonyms: potholer, spelaeologist, speleologist |
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| spend | (verb) pay out | Synonyms: drop, expend |
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| (verb) spend completely | - |
| (verb) use up a period of time in a specific way | Synonyms: pass |
| spendable | (adjective) (used of funds) remaining after taxes | Synonyms: expendable |
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| spender | (noun) someone who spends money to purchase goods or services | Synonyms: disburser, expender |
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| (noun) someone who spends money prodigally | Synonyms: scattergood, spend-all, spendthrift |
| spending | (noun) the act of spending or disbursing money | Synonyms: disbursal, disbursement, outlay |
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| (noun) money paid out; an amount spent | Synonyms: expenditure, outgo, outlay |
| spendthrift | (adjective) recklessly wasteful | Synonyms: extravagant, prodigal, profligate |
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| (noun) someone who spends money prodigally | Synonyms: scattergood, spend-all, spender |
| spent | (adjective) depleted of energy, force, or strength | Synonyms: exhausted |
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| (adjective) drained of energy or effectiveness; extremely tired; completely exhausted | Synonyms: dog-tired, exhausted, fagged, fatigued, gone, played out, washed-out, worn-out, worn out |
| sperm | (noun) the male reproductive cell; the male gamete | Synonyms: sperm cell, spermatozoan, spermatozoon |
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| spermaceti | (noun) a white waxy substance from oil of the sperm whale | - |
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| spermatic | (adjective) consisting of or resembling spermatozoa | Synonyms: spermous |
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| spermatid | (noun) an immature gamete produced by a spermatocyte; develops into a spermatozoon | - |
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| spermatocele | (noun) a swelling on the epididymis or the testis; usually contains spermatozoa | - |
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| spermatocide | (noun) a contraceptive agent that kills spermatozoa | Synonyms: spermicide |
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| spermatocyte | (noun) a male gametocyte that develops into four spermatids | - |
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| spermatogenesis | (noun) development of spermatozoa | - |
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| spermatophyte | (noun) plant that reproduces by means of seeds not spores | Synonyms: phanerogam, seed plant |
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| spermatozoan | (noun) the male reproductive cell; the male gamete | Synonyms: sperm, sperm cell, spermatozoon |
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| spermatozoid | (noun) a motile male gamete of a plant such as an alga or fern or gymnosperm | Synonyms: antherozoid |
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| spermatozoon | (noun) the male reproductive cell; the male gamete | Synonyms: sperm, sperm cell, spermatozoan |
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| spermicidal | (adjective) destructive to spermatozoa | - |
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| spermicide | (noun) a contraceptive agent that kills spermatozoa | Synonyms: spermatocide |
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| spermophile | (noun) any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops | Synonyms: gopher, ground squirrel |
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| spermous | (adjective) consisting of or resembling spermatozoa | Synonyms: spermatic |
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| spew | (verb) eject the contents of the stomach through the mouth | Synonyms: barf, be sick, cast, cat, chuck, disgorge, honk, puke, purge, regorge, regurgitate, retch, sick, spue, throw up, upchuck, vomit, vomit up |
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| (verb) expel or eject (saliva or phlegm or sputum) from the mouth | Synonyms: ptyalise, ptyalize, spit, spue |
| (verb) eject or send out in large quantities, also metaphorical | Synonyms: eruct, spew out |
| spewer | (noun) a person who vomits | Synonyms: vomiter |
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| sphacelate | (verb) undergo necrosis | Synonyms: gangrene, mortify, necrose |
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| sphacelus | (noun) the localized death of living cells (as from infection or the interruption of blood supply) | Synonyms: gangrene, mortification, necrosis |
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| (noun) necrotic tissue; a mortified or gangrenous part or mass | Synonyms: gangrene, slough |
| sphagnum | (noun) any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat | Synonyms: bog moss, peat moss, sphagnum moss |
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| sphalerite | (noun) an ore that is the chief source of zinc; consists largely of zinc sulfide in crystalline form | Synonyms: blende, zinc blende |
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| sphecoid | (noun) any of various solitary wasps | Synonyms: sphecoid wasp |
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| sphenion | (noun) the anterior tip of the parietal bone | - |
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| sphenoid | (noun) butterfly-shaped bone at the base of the skull | Synonyms: os sphenoidale, sphenoid bone |
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| sphere | (noun) any spherically shaped artifact | - |
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| (noun) a particular aspect of life or activity | Synonyms: sector |
| (noun) the geographical area in which one nation is very influential | Synonyms: sphere of influence |
| (noun) the apparent surface of the imaginary sphere on which celestial bodies appear to be projected | Synonyms: celestial sphere, empyrean, firmament, heavens, vault of heaven, welkin |
| (noun) a solid figure bounded by a spherical surface (including the space it encloses) | - |
| (noun) a three-dimensional closed surface such that every point on the surface is equidistant from the center | - |
| (noun) a particular environment or walk of life | Synonyms: area, arena, domain, field, orbit |
| spheric | (adjective) having the shape of a sphere or ball | Synonyms: ball-shaped, global, globose, globular, orbicular, spherical |
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| spherical | (adjective) of or relating to spheres or resembling a sphere | - |
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| (adjective) having the shape of a sphere or ball | Synonyms: ball-shaped, global, globose, globular, orbicular, spheric |
| spherically | (adverb) in a spherical manner | - |
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| sphericalness | (noun) the roundness of a 3-dimensional object | Synonyms: globosity, globularness, rotundity, rotundness, sphericity |
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| sphericity | (noun) the roundness of a 3-dimensional object | Synonyms: globosity, globularness, rotundity, rotundness, sphericalness |
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| spherocyte | (noun) an abnormal spherical red blood cell | - |
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| spheroid | (noun) a shape that is generated by rotating an ellipse around one of its axes | Synonyms: ellipsoid of revolution |
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| spheroidal | (adjective) having the nature or shape of an ellipsoid | Synonyms: ellipsoid, ellipsoidal |
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| spherometer | (noun) a measuring instrument for measuring the curvature of a surface | - |
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| spherule | (noun) a small sphere | - |
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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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| sphingid | (noun) any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed | Synonyms: hawk moth, hawkmoth, hummingbird moth, sphinx moth |
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| sphingine | (adjective) resembling a sphinx | - |
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| sphinx | (noun) one of a number of large stone statues with the body of a lion and the head of a man that were built by the ancient Egyptians | - |
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| (noun) an inscrutable person who keeps his thoughts and intentions secret | - |
| sphygmomanometer | (noun) a pressure gauge for measuring blood pressure | - |
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| spic | (adjective) completely neat and clean | Synonyms: immaculate, speckless, spic-and-span, spick-and-span, spick, spotless |
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| (noun) (ethnic slur) offensive term for persons of Latin American descent | Synonyms: spick, spik |
| spicate | (adjective) having or relating to spikes | - |
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| spiccato | (noun) bowing in such a way that the bow bounces lightly off the strings | Synonyms: spiccato bowing |
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| spice | (noun) the property of being seasoned with spice and so highly flavored | Synonyms: spicery, spiciness |
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| (noun) any of a variety of pungent aromatic vegetable substances used for flavoring food | - |
| (noun) aromatic substances of vegetable origin used as a preservative | - |
| (verb) make more interesting or flavorful | Synonyms: spice up |
| (verb) add herbs or spices to | Synonyms: spice up, zest |
| spiceberry | (noun) spicy red berrylike fruit; source of wintergreen oil | Synonyms: boxberry, checkerberry, teaberry, wintergreen |
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| (noun) shrub with coral-red berries; Japan to northern India | Synonyms: Ardisia crenata, coralberry |
| spicebush | (noun) deciduous shrub of the eastern United States having highly aromatic leaves and bark and yellow flowers followed by scarlet or yellow berries | Synonyms: American spicebush, Benjamin bush, Benzoin odoriferum, Lindera benzoin, spice bush |
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| (noun) straggling aromatic shrub of southwestern United States having fragrant brown flowers | Synonyms: California allspice, Calycanthus occidentalis |
| spicemill | (noun) a mill for grinding spices | - |
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| spicery | (noun) the property of being seasoned with spice and so highly flavored | Synonyms: spice, spiciness |
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| spicily | (adverb) with strong spices; in a spicy manner | Synonyms: piquantly |
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| spiciness | (noun) the property of being seasoned with spice and so highly flavored | Synonyms: spice, spicery |
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| (noun) behavior or language bordering on indelicacy | Synonyms: gaminess, raciness, ribaldry |
| spick | (adjective) completely neat and clean | Synonyms: immaculate, speckless, spic-and-span, spic, spick-and-span, spotless |
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| (noun) (ethnic slur) offensive term for persons of Latin American descent | Synonyms: spic, spik |
| spicule | (noun) small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals | Synonyms: spiculum |
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| spiculum | (noun) small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals | Synonyms: spicule |
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| spicy | (adjective) suggestive of sexual impropriety | Synonyms: blue, gamey, gamy, juicy, naughty, racy, risque |
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| (adjective) producing a burning sensation on the taste nerves | Synonyms: hot |
| spider | (noun) predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey | - |
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| (noun) a skillet made of cast iron | - |
| (noun) a computer program that prowls the internet looking for publicly accessible resources that can be added to a database; the database can then be searched with a search engine | Synonyms: wanderer |
| spiderflower | (noun) any of various often strong-smelling plants of the genus Cleome having showy spider-shaped flowers | Synonyms: cleome |
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| spiderlike | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, arachnoid, spiderly, spidery |
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| spiderly | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, arachnoid, spiderlike, spidery |
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| spiderwort | (noun) any plant of the family Commelinaceae | Synonyms: dayflower |
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| spidery | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnidian, arachnoid, spiderlike, spiderly |
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| spiegel | (noun) pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel | Synonyms: spiegel iron, spiegeleisen |
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| spiegeleisen | (noun) pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel | Synonyms: spiegel, spiegel iron |
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| spiel | (noun) plausible glib talk (especially useful to a salesperson) | Synonyms: line of gab, patter |
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| (verb) speak at great length (about something) | - |
| (verb) replay (as a melody) | Synonyms: play |
| spiff | (noun) attractiveness in appearance or dress or manner | - |
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| spiffing | (adjective) excellent or splendid | - |
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| spiffy | (adjective) marked by up-to-dateness in dress and manners | Synonyms: dapper, dashing, jaunty, natty, raffish, rakish, snappy, spruce |
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| spigot | (noun) a regulator for controlling the flow of a liquid from a reservoir | Synonyms: faucet |
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| (noun) a plug for a bunghole in a cask | Synonyms: tap |