| 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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