| peridotite | (noun) a dark coarse-grained igneous rock consisting principally of olivine | - |
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| perquisite | (noun) a right reserved exclusively by a particular person or group (especially a hereditary or official right) | Synonyms: exclusive right, prerogative, privilege |
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| (noun) an incidental benefit awarded for certain types of employment (especially if it is regarded as a right) | Synonyms: fringe benefit, perk |
| petite | (noun) a garment size for short or slender women | - |
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| phillipsite | (noun) a group of white or reddish crystalline minerals of the zeolite family consisting of a hydrous silicate of calcium and potassium and aluminum | - |
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| phlogopite | (noun) a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum | - |
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| pinite | (noun) grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates | - |
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| plebiscite | (noun) a vote by the electorate determining public opinion on a question of national importance | - |
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| pollucite | (noun) a rare mineral that is an important source of cesium | - |
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| prerequisite | (noun) something that is required in advance | Synonyms: requirement |
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| preterite | (noun) a term formerly used to refer to the simple past tense | Synonyms: preterit |
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| pseudohermaphrodite | (noun) someone having external genitalia of one sex and internal sex organs of the other sex; not a true hermaphrodite because there is no ambiguity in the sex of the external genitalia and hence no question about gender at birth | - |
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| pyrite | (noun) a common mineral (iron disulfide) that has a pale yellow color | Synonyms: fool's gold, iron pyrite |
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| pyrolusite | (noun) a mineral consisting of manganese dioxide; an important source of manganese | - |
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| pyromorphite | (noun) a mineral consisting of lead chloride and phosphate; a minor source of lead | Synonyms: green lead ore |
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| pyrophyllite | (noun) a white or greenish aluminum silicate mineral (resembles talc) | - |
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| pyrrhotite | (noun) a brownish iron sulfide mineral (FeS) having weak magnetic properties | Synonyms: magnetic pyrites, pyrrhotine |
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| quartzite | (noun) hard metamorphic rock consisting essentially of interlocking quartz crystals | - |
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| ratite | (noun) flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches, cassowaries, emus, moas, rheas, kiwis, elephant birds | Synonyms: flightless bird, ratite bird |
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| rensselaerite | (noun) a kind of soft talc; sometimes used as wood filler | - |
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| requisite | (noun) anything indispensable | Synonyms: essential, necessary, necessity, requirement |
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| respite | (noun) a pause from doing something (as work) | Synonyms: break, recess, time out |
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| (noun) the act of reprieving; postponing or remitting punishment | Synonyms: reprieve |
| (noun) an interruption in the intensity or amount of something | Synonyms: abatement, hiatus, reprieve, suspension |
| (noun) a (temporary) relief from harm or discomfort | Synonyms: reprieve |
| (noun) a pause for relaxation | Synonyms: relief, rest, rest period |
| rewrite | (noun) something that has been written again | Synonyms: rescript, revision |
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| rhodochrosite | (noun) a mineral consisting of manganese carbonate; a source of manganese | - |
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| rhodolite | (noun) a red or pink variety of garnet used as a gemstone | - |
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| rhodonite | (noun) a pink or red mineral consisting of crystalline manganese silicate; used as an ornamental stone | - |
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| rhyolite | (noun) very acid volcanic rock | - |
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| rite | (noun) any customary observance or practice | Synonyms: ritual |
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| (noun) an established ceremony prescribed by a religion | Synonyms: religious rite |
| samarskite | (noun) a complex black mineral occurring in pegmatites | - |
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| samite | (noun) a heavy silk fabric (often woven with silver or gold threads); used to make clothing in the Middle Ages | - |
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| saprolite | (noun) a deposit of clay and disintegrating rock that is found in its original place | - |
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| satellite | (noun) man-made equipment that orbits around the earth or the moon | Synonyms: artificial satellite, orbiter |
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| (noun) any celestial body orbiting around a planet or star | - |
| (noun) a person who follows or serves another | Synonyms: planet |
| scheelite | (noun) a mineral used as an ore of tungsten | - |
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| sclerite | (noun) hard plate or element of the exoskeleton of some arthropods | - |
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| selenite | (noun) a compound that contains a SeO32− anion. | - |
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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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| sepiolite | (noun) a white clayey mineral | Synonyms: meerschaum |
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| shite | (noun) obscene terms for feces | Synonyms: crap, dirt, poop, shit, turd |
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| siderite | (noun) a meteorite consisting principally of nickel and iron | - |
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| (noun) iron ore in the form of ferrous carbonate | Synonyms: chalybite |
| site | (noun) a computer connected to the internet that maintains a series of web pages on the World Wide Web; a computer connected to the internet that maintains a series of web pages on the World Wide Web | Synonyms: internet site, web site, website |
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| (noun) the piece of land on which something is located (or is to be located) | Synonyms: land site |
| (noun) physical position in relation to the surroundings | Synonyms: situation |
| smaltite | (noun) a grey mineral consisting of cobalt arsenide and nickel; an important source of cobalt and nickel | - |
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| smithsonite | (noun) a mineral ore of zinc. | Synonyms: zinc spar |
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| snakebite | (noun) a bite inflicted by a (venomous) snake | - |
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| socialite | (noun) a socially prominent person | - |
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| sodalite | (noun) a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks | - |
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| sodomite | (noun) someone who engages in anal copulation (especially a male who engages in anal copulation with another male) | Synonyms: bugger, sod, sodomist |
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| somite | (noun) one of a series of similar body segments into which some animals are divided longitudinally | Synonyms: metamere |
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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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| spite | (noun) malevolence by virtue of being malicious or spiteful or nasty | Synonyms: bitchiness, cattiness, nastiness, spitefulness |
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| (noun) feeling a need to see others suffer | Synonyms: malice, maliciousness, spitefulness, venom |
| sporozoite | (noun) one of the minute active bodies into which sporozoans divide in one stage of their life cycle | - |
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| sprite | (noun) a small being, human in form, playful and having magical powers | Synonyms: faerie, faery, fairy, fay |
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| stalactite | (noun) a cylinder of calcium carbonate hanging from the roof of a limestone cave | - |
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| stalagmite | (noun) a cylinder of calcium carbonate projecting upward from the floor of a limestone cave | - |
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| stannite | (noun) a dark grey mineral with a metallic luster that is a source of tin | Synonyms: tin pyrites |
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| steatite | (noun) a soft heavy compact variety of talc having a soapy feel; used to make hearths and tabletops and ornaments | Synonyms: soap-rock, soaprock, soapstone |
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| stibnite | (noun) a soft grey mineral; the chief ore of antimony | - |
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| strontianite | (noun) a mineral consisting of strontium carbonate | - |
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| stylite | (noun) an early Christian ascetic who lived on top of high pillars | - |
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| suburbanite | (noun) a resident of a suburb | - |
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| suite | (noun) apartment consisting of a series of connected rooms used as a living unit (as in a hotel) | Synonyms: rooms |
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| (noun) a musical composition of several movements only loosely connected | - |
| (noun) the group following and attending to some important person | Synonyms: cortege, entourage, retinue |
| (noun) a matching set of furniture | - |
| sybarite | (noun) a person addicted to luxury and pleasures of the senses | Synonyms: voluptuary |
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| sylvanite | (noun) a silver-white mineral consisting of silver gold telluride; a source of gold in Australia and America | Synonyms: graphic tellurium |
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| sylvite | (noun) a mineral consisting of native potassium chloride; an important ore of potassium that is found in sedimentary beds | Synonyms: sylvine |
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| tachylite | (noun) a basic or basalt glass | - |
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| taconite | (noun) a variety of chert containing magnetite and hematite; mined as a low-grade iron ore | - |
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| tantalite | (noun) a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum | - |
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| tektite | (noun) thought to derive from meteorites | - |
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| termite | (noun) whitish soft-bodied ant-like social insect that feeds on wood | Synonyms: white ant |
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| textolite | (noun) a laminated composite material used for electrotechnical components, inserts and bearings. | - |
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| theodolite | (noun) a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod | Synonyms: transit |
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| thorite | (noun) a radioactive mineral consisting of thorium silicate; it is a source of thorium that is found in coarse granite | - |
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| thortveitite | (noun) a mineral consisting of scandium yttrium silicate; a source of scandium | - |
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| transvestite | (noun) someone who adopts the dress or manner or sexual role of the opposite sex | Synonyms: cross-dresser |
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| tremolite | (noun) a white or pale green mineral (calcium magnesium silicate) of the amphibole group used as a form of asbestos | - |
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| tridymite | (noun) a mineral form of silica | - |
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| trilobite | (noun) an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts | - |
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| trophozoite | (noun) a sporozoan in the active feeding stage of its life cycle | - |
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| uraninite | (noun) a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore | Synonyms: pitchblende |
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| vanadinite | (noun) a mineral consisting of chloride and vanadate of lead; a source of vanadium | - |
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| vermiculite | (noun) any of a group of yellow or brown hydrous silicate minerals having a micaceous structure | - |
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| vesuvianite | (noun) a green or yellow or brown mineral consisting of a hydrated silicate; it occurs as crystals in limestone and is used a gemstone | Synonyms: idocrase, vesuvian |
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| vulcanite | (noun) a hard nonresilient rubber formed by vulcanizing natural rubber | Synonyms: ebonite, hard rubber |
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| website | (noun) a computer connected to the internet that maintains a series of web pages on the World Wide Web; a computer connected to the internet that maintains a series of web pages on the World Wide Web | Synonyms: internet site, site, web site |
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| white | (noun) (board games) the lighter pieces | - |
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| (noun) (usually in the plural) trousers made of flannel or gabardine or tweed or white cloth | Synonyms: flannel, gabardine, tweed |
| (noun) the quality or state of the achromatic color of greatest lightness (bearing the least resemblance to black) | Synonyms: whiteness |
| (noun) the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water | Synonyms: albumen, egg white, ovalbumin |
| wolframite | (noun) a mineral consisting of iron and manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocks | Synonyms: iron manganese tungsten |
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| wollastonite | (noun) a white or greyish mineral typically found in metamorphic limestone; a silicate of calcium | - |
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| wulfenite | (noun) a yellow to orange or brown mineral used as a molybdenum ore | - |
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| wurtzite | (noun) a brownish-black mineral consisting of zinc sulfide | - |
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| ytterbite | (noun) a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium | Synonyms: gadolinite |
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| zeolite | (noun) any of a family of glassy minerals analogous to feldspar containing hydrated aluminum silicates of calcium or sodium or potassium; formed in cavities in lava flows and in plutonic rocks | - |
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| zinkenite | (noun) a steel grey metallic mineral (a sulphide of lead and antimony) | - |
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| zinnwaldite | (noun) a mica containing iron and lithium | - |
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