| parasol | (noun) a handheld collapsible source of shade | Synonyms: sunshade |
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| parasympathetic | (noun) originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels | Synonyms: parasympathetic nervous system |
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| pederast | (noun) a man who has sex (usually sodomy) with a boy as the passive partner | Synonyms: child molester, paederast |
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| pederasty | (noun) sexual relations between a man and a boy (usually anal intercourse with the boy as a passive partner) | Synonyms: paederasty |
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| periphrasis | (noun) a style that involves indirect ways of expressing things | Synonyms: ambage, circumlocution |
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| phrase | (noun) dance movements that are linked in a single choreographic sequence | - |
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| (noun) an expression consisting of one or more words forming a grammatical constituent of a sentence | - |
| (noun) a short musical passage | Synonyms: musical phrase |
| (noun) an expression whose meanings cannot be inferred from the meanings of the words that make it up | Synonyms: idiom, idiomatic expression, phrasal idiom, set phrase |
| phraseology | (noun) the manner in which something is expressed in words | Synonyms: choice of words, diction, phrasing, verbiage, wording |
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| phrasing | (noun) the grouping of musical phrases in a melodic line | - |
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| (noun) the manner in which something is expressed in words | Synonyms: choice of words, diction, phraseology, verbiage, wording |
| polymerase | (noun) an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA | - |
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| praseodymium | (noun) a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process | Synonyms: atomic number 59, Pr |
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| procrastination | (noun) the act of procrastinating; putting off or delaying or deferring an action to a later time | Synonyms: cunctation, shillyshally |
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| (noun) slowness as a consequence of not getting around to it | Synonyms: dilatoriness |
| procrastinator | (noun) someone who postpones work (especially out of laziness or habitual carelessness) | Synonyms: cunctator, postponer |
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| quackgrass | (noun) European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed | Synonyms: Agropyron repens, couch grass, dog grass, quack grass, quick grass, witch grass, witchgrass |
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| rascal | (noun) one who is playfully mischievous | Synonyms: imp, monkey, rapscallion, scalawag, scallywag, scamp |
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| (noun) a deceitful and unreliable scoundrel | Synonyms: knave, rapscallion, rogue, scalawag, scallywag, varlet |
| rascality | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilment, devilry, deviltry, mischief-making, mischief, mischievousness, roguery, roguishness, shenanigan |
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| (noun) the trait of indulging in disreputable pranks | Synonyms: prankishness, roguishness |
| (noun) the quality of being a slippery rascal | Synonyms: shiftiness, slipperiness, trickiness |
| rash | (noun) a series of unexpected and unpleasant occurrences | Synonyms: blizzard |
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| (noun) any red eruption of the skin | Synonyms: efflorescence, roseola, skin rash |
| rasher | (noun) a commercially important fish of the Pacific coast of North America | Synonyms: Sebastes miniatus, vermillion rockfish |
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| rashness | (noun) the trait of giving little thought to danger | Synonyms: foolhardiness, recklessness |
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| (noun) the trait of acting rashly and without prudence | Synonyms: heedlessness, mindlessness |
| rasp | (noun) a coarse file with sharp pointed projections | Synonyms: wood file |
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| (noun) uttering in an irritated tone | Synonyms: rasping |
| raspberry | (noun) a cry or noise made to express displeasure or contempt | Synonyms: bird, boo, Bronx cheer, hiss, hoot, razz, razzing, snort |
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| (noun) red or black edible aggregate berries usually smaller than the related blackberries | - |
| (noun) woody brambles bearing usually red but sometimes black or yellow fruits that separate from the receptacle when ripe and are rounder and smaller than blackberries | Synonyms: raspberry bush |
| raspiness | (noun) (of sound) The state or characteristic of being rough or raw, especially used to describe vocal quality. | - |
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| rasping | (noun) uttering in an irritated tone | Synonyms: rasp |
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| rassling | (noun) the sport of hand-to-hand struggle between unarmed contestants who try to throw each other down | Synonyms: grappling, wrestling |
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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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| rephrasing | (noun) changing a particular word or phrase | Synonyms: recasting, rewording |
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| ribgrass | (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: buckthorn, English plantain, narrow-leaved plantain, Plantago lanceolata, ribwort, ripple-grass |
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| ricegrass | (noun) any grass of the genus Oryzopsis | Synonyms: rice grass |
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| ryegrass | (noun) any of several annual or perennial Eurasian grasses | Synonyms: rye grass |
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| saccharase | (noun) an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose | Synonyms: invertase, sucrase |
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| sassafras | (noun) dried root bark of the sassafras tree | - |
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| (noun) yellowwood tree with brittle wood and aromatic leaves and bark; source of sassafras oil; widely distributed in eastern North America | Synonyms: Sassafras albidum, sassafras tree |
| seagrass | (noun) any of various seaweeds that grow underwater in shallow beds | - |
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| semiparasite | (noun) a parasitic plant that contains some chlorophyll and therefore is capable of photosynthesis | Synonyms: hemiparasite |
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| shortgrass | (noun) any of various grasses that are short and can tolerate drought conditions; common on the dry upland plains just east of the Rocky Mountains | Synonyms: short-grass |
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| silkgrass | (noun) valuable forage grass of dry upland areas and plains of western North America to northern Mexico | Synonyms: Indian millet, mountain rice, Oryzopsis hymenoides, silk grass |
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| sucrase | (noun) an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose | Synonyms: invertase, saccharase |
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| supergrass | (noun) a police informer who implicates many people | Synonyms: grass |
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| tallgrass | (noun) any of various grasses that are tall and that flourish with abundant moisture | Synonyms: tall-grass |
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| telomerase | (noun) an enzyme in eukaryotic cells that can add telomeres to the ends of chromosomes after they divide | - |
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| teras | (noun) (medicine) a grossly malformed and usually nonviable fetus | Synonyms: monster |
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| tetrasaccharide | (noun) any of a variety of carbohydrates that yield four monosaccharide molecules on complete hydrolysis | - |
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| tetraskele | (noun) a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center | Synonyms: tetraskelion |
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| tetraskelion | (noun) a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center | Synonyms: tetraskele |
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| tetrasporangium | (noun) a sporangium containing four asexual spores | - |
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| tetraspore | (noun) one of the four asexual spores produced within a sporangium | - |
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| thrash | (noun) a swimming kick used while treading water | - |
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| thrasher | (noun) thrush-like American songbird able to mimic other birdsongs | Synonyms: mocking thrush |
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| (noun) large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed | Synonyms: Alopius vulpinus, fox shark, thresher, thresher shark |
| (noun) a farm machine for separating seeds or grain from the husks and straw | Synonyms: thresher, threshing machine |
| thrashing | (noun) the act of inflicting corporal punishment with repeated blows | Synonyms: beating, drubbing, lacing, licking, trouncing, whacking |
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| (noun) a sound defeat | Synonyms: debacle, drubbing, slaughter, trouncing, walloping, whipping |
| transferase | (noun) any of various enzymes that move a chemical group from one compound to another compound | - |
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| trash | (noun) an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant | Synonyms: chalk, chicken feed, crank, deoxyephedrine, glass, ice, meth, methamphetamine, methamphetamine hydrochloride, Methedrine, shabu |
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| (noun) nonsensical talk or writing | Synonyms: applesauce, codswallop, folderol, rubbish, tripe, trumpery, wish-wash |
| (noun) worthless people | Synonyms: scum |
| (noun) worthless material that is to be disposed of | Synonyms: rubbish, scrap |
| trashiness | (noun) the quality of being cheaply imitative of something better | Synonyms: shoddiness |
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| ultrasonography | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: echography, sonography, ultrasound |
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| ultrasound | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: echography, sonography, ultrasonography |
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| (noun) very high frequency sound; used in ultrasonography | - |
| wheatgrass | (noun) a grass of the genus Agropyron | Synonyms: wheat-grass |
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| witchgrass | (noun) North American grass with slender brushy panicles; often a weed on cultivated land | Synonyms: old witch grass, old witchgrass, Panicum capillare, tumble grass, witch grass |
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| (noun) European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed | Synonyms: Agropyron repens, couch grass, dog grass, quack grass, quackgrass, quick grass, witch grass |
| wrasse | (noun) chiefly tropical marine fishes with fleshy lips and powerful teeth; usually brightly colored | - |
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| yardgrass | (noun) coarse annual grass having fingerlike spikes of flowers; native to Old World tropics; a naturalized weed elsewhere | Synonyms: Eleusine indica, goose grass, wire grass, yard grass |
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| zooerastia | (noun) sexual activity between a person and an animal | Synonyms: bestiality, sodomy, zooerasty |
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| zooerasty | (noun) sexual activity between a person and an animal | Synonyms: bestiality, sodomy, zooerastia |
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