| peccadillo | (noun) a petty misdeed | Synonyms: indiscretion |
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| pencilled | (adjective) drawn or written with a pencil | Synonyms: penciled |
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| penicillamine | (noun) a drug (trade name Cuprimine) used to treat heavy metal poisoning and Wilson's disease and severe arthritis | Synonyms: Cuprimine |
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| penicillin | (noun) any of various antibiotics obtained from Penicillium molds (or produced synthetically) and used in the treatment of various infections and diseases | - |
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| penicillinase | (noun) enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic | Synonyms: beta-lactamase |
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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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| piccalilli | (noun) relish of chopped pickled cucumbers and green peppers and onion | - |
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| pigswill | (noun) wet feed (especially for pigs) consisting of mostly kitchen waste mixed with water or skimmed or sour milk | Synonyms: pigwash, slop, slops, swill |
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| pill | (noun) a dose of medicine in the form of a small pellet | Synonyms: lozenge, tab, tablet |
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| (noun) something that resembles a tablet of medicine in shape or size | - |
| (noun) a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception | Synonyms: anovulant, anovulatory drug, birth control pill, contraceptive pill, oral contraceptive, oral contraceptive pill |
| (noun) something unpleasant or offensive that must be tolerated or endured | - |
| (noun) a unpleasant or tiresome person | - |
| pillage | (noun) the act of stealing valuable things from a place | Synonyms: pillaging, plundering |
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| (noun) goods or money obtained illegally | Synonyms: booty, dirty money, loot, plunder, prize, swag |
| (verb) steal goods; take as spoils | Synonyms: despoil, foray, loot, plunder, ransack, reave, rifle, strip |
| pillaged | (adjective) having been robbed and destroyed by force and violence | Synonyms: despoiled, raped, ravaged, sacked |
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| (adjective) wrongfully emptied or stripped of anything of value | Synonyms: looted, plundered, ransacked |
| pillager | (noun) someone who takes spoils or plunder (as in war) | Synonyms: despoiler, freebooter, looter, plunderer, raider, spoiler |
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| pillaging | (noun) the act of stealing valuable things from a place | Synonyms: pillage, plundering |
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| pillar | (noun) (architecture) a tall vertical cylindrical structure standing upright and used to support a structure | Synonyms: column |
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| (noun) a vertical cylindrical structure standing alone and not supporting anything (such as a monument) | Synonyms: column |
| (noun) a fundamental principle or practice | - |
| (noun) a prominent supporter | Synonyms: mainstay |
| (noun) anything that approximates the shape of a column or tower | Synonyms: column, tower |
| pillared | (adjective) having pillars | - |
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| pillbox | (noun) a small enclosed gun emplacement (usually of fortified concrete) | - |
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| (noun) a small case for holding pills | - |
| (noun) a small round woman's hat | Synonyms: toque, turban |
| pillion | (noun) a seat behind the rider of a horse or motorbike etc. | - |
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| pillock | (noun) a person who is not very bright | Synonyms: dolt, dullard, poor fish, pudden-head, pudding head, stupe, stupid, stupid person |
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| pillory | (noun) a wooden instrument of punishment on a post with holes for the wrists and neck; offenders were locked in and so exposed to public scorn | - |
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| (verb) criticize harshly or violently | Synonyms: blast, crucify, savage |
| (verb) punish by putting in a pillory | - |
| (verb) expose to ridicule or public scorn | Synonyms: gibbet |
| pillow | (noun) a cushion to support the head of a sleeping person | - |
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| (verb) rest on or as if on a pillow | Synonyms: rest |
| pillowcase | (noun) bed linen consisting of a cover for a pillow | Synonyms: case, pillow slip, slip |
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| pillwort | (noun) European water fern found around margins of bodies of water or in wet acid soil having small globose sporocarps | Synonyms: Pilularia globulifera |
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| piperacillin | (noun) a synthetic type of penicillin antibiotic (trade name Pipracil) used for moderate to severe infections | Synonyms: Pipracil |
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| pistillate | (adjective) bearing or consisting of carpels | Synonyms: carpellate |
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| (adjective) having gynoecia, or pistils, the ovule-bearing organ of a seed plant | - |
| pistillode | (noun) a sterile vestigial pistil remaining in a staminate flower | - |
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| playbill | (noun) a theatrical program | - |
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| pointillism | (noun) a genre of painting characterized by the application of paint in dots and small strokes; developed by Georges Seurat and his followers in late 19th century France | - |
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| (noun) a school of painters who used a technique of painting with tiny dots of pure colors that would blend in the viewer's eye; developed by Georges Seurat and his followers late in 19th century France | - |
| pointillist | (adjective) of or relating to pointillism | Synonyms: pointillistic |
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| (noun) a painter who uses the technique of pointillism | - |
| pointillistic | (adjective) of or relating to pointillism | Synonyms: pointillist |
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| poorwill | (noun) goatsucker of western North America | Synonyms: Phalaenoptilus nuttallii |
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| postillion | (noun) someone who rides the near horse of a pair in order to guide the horses pulling a carriage (especially a carriage without a coachman) | Synonyms: postilion |
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| postmillennial | (adjective) of or relating to the period following the millennium | - |
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| pupillary | (adjective) of or relating to the pupil of the eye | - |
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| pusillanimity | (noun) contemptible fearfulness | Synonyms: pusillanimousness |
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| pusillanimous | (adjective) lacking in courage and manly strength and resolution; contemptibly fearful | Synonyms: poor-spirited, unmanly |
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| pusillanimously | (adverb) with a lack of courage and determination | Synonyms: simperingly |
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| pusillanimousness | (noun) contemptible fearfulness | Synonyms: pusillanimity |
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| quadrille | (noun) a square dance of 5 or more figures for 4 or more couples | - |
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| (noun) music for dancing the quadrille | - |
| quadrillion | (noun) the number that is represented as a one followed by 15 zeros | - |
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| (noun) the number that is represented as a one followed by 24 zeros in the UK | - |
| quadrillionth | (adjective) the ordinal number of one quadrillion in counting order | - |
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| (noun) one part in a quadrillion equal parts | Synonyms: one-quadrillionth |
| quesadilla | (noun) a tortilla that is filled with cheese and heated | - |
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| quill | (noun) a stiff hollow protective spine on a porcupine or hedgehog | - |
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| (noun) the hollow spine of a feather | Synonyms: calamus, shaft |
| (noun) any of the larger wing or tail feathers of a bird | Synonyms: flight feather, pinion, quill feather |
| (noun) pen made from a bird's feather | Synonyms: quill pen |
| quillwort | (noun) any of several spore-bearing aquatic or marsh plants having short rhizomes and leaves resembling quills; worldwide except Polynesia | - |
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| quintillion | (noun) the number that is represented as a one followed by 18 zeros in the US | - |
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| quintillionth | (adjective) the ordinal number of one quintillion in counting order | - |
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| (noun) one part in a quintillion equal parts | Synonyms: one-quintillionth |
| raillery | (noun) light teasing repartee | Synonyms: backchat, banter, give-and-take |
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| ratatouille | (noun) a vegetable stew; usually made with tomatoes, eggplant, zucchini, peppers, onion, and seasonings | - |
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| razorbill | (noun) black-and-white northern Atlantic auk having a compressed sharp-edged bill | Synonyms: Alca torda, razor-billed auk |
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| recoilless | (adjective) of or being a weapon that is designed to minimize recoil | - |
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| refill | (noun) a commercial product that refills a container with its appropriate contents | - |
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| (noun) a prescription drug that is provided again | - |
| (verb) fill something that had previously been emptied | Synonyms: fill again, replenish |
| refilling | (noun) filling again by supplying what has been used up | Synonyms: renewal, replacement, replenishment |
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| reveille | (noun) a signal to get up in the morning; in the military it is a bugle call at sunrise | - |
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| (noun) (military) signal to wake up | Synonyms: wake-up signal |
| rill | (noun) a small stream | Synonyms: rivulet, run, runnel, streamlet |
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| (noun) a small channel (as one formed by soil erosion) | - |
| roadkill | (noun) the dead body of an animal that has been killed on a road by a vehicle | - |
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| rockabilly | (noun) a fusion of black music and country music that was popular in the 1950s; sometimes described as blues with a country beat | - |
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| rosilla | (noun) a sneezeweed of southwestern United States especially southern California | Synonyms: Helenium puberulum |
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| saddlebill | (noun) large black-and-white stork of tropical Africa; its red bill has a black band around the middle | Synonyms: Ephippiorhynchus senegalensis, jabiru |
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| salsilla | (noun) tropical vine having pink-and-yellow flowers spotted purple and edible roots sometimes boiled as a potato substitute; West Indies to northern South America | Synonyms: Bomarea edulis |
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| (noun) tropical vine having umbels of small purple flowers and edible roots sometimes boiled as a potato substitute; Colombia | Synonyms: Bomarea salsilla |
| sapodilla | (noun) tropical fruit with a rough brownish skin and very sweet brownish pulp | Synonyms: sapodilla plum, sapota |
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| (noun) large tropical American evergreen yielding chicle gum and edible fruit; sometimes placed in genus Achras | Synonyms: Achras zapota, Manilkara zapota, sapodilla tree |
| sarsaparilla | (noun) carbonated drink flavored with an extract from sarsaparilla root or with birch oil and sassafras | - |
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| (noun) any of various prickly climbing plants of the tropical American genus Smilax having aromatic roots and heart-shaped leaves | - |
| sawbill | (noun) large crested fish-eating diving duck having a slender hooked bill with serrated edges | Synonyms: fish duck, merganser, sheldrake |
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| sawmill | (noun) a mill for dressing logs and lumber | Synonyms: lumbermill |
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| (noun) a large sawing machine | - |
| schilling | (noun) formerly the basic unit of money in Austria | Synonyms: Austrian schilling |
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| scilla | (noun) an Old World plant of the genus Scilla having narrow basal leaves and pink or blue or white racemose flowers | Synonyms: squill |
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| scillaren | (noun) a crystalline steroidal glycoside present in squill (Drimia maritima). | - |
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| scintilla | (noun) a sparkling glittering particle | - |
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| (noun) a tiny or scarcely detectable amount | Synonyms: iota, shred, smidge, smidgen, smidgeon, smidgin, tittle, whit |
| scintillant | (adjective) having brief brilliant points or flashes of light | Synonyms: aglitter, coruscant, fulgid, glinting, glistering, glittering, glittery, scintillating, sparkly |
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| scintillate | (verb) be lively or brilliant or exhibit virtuosity | Synonyms: coruscate, sparkle |
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| (verb) fluoresce momentarily when struck by a charged particle or high-energy photon | - |
| (verb) emit or reflect light in a flickering manner | Synonyms: twinkle, winkle |
| (verb) give off | - |
| (verb) reflect brightly | Synonyms: coruscate, sparkle |
| scintillating | (adjective) having brief brilliant points or flashes of light | Synonyms: aglitter, coruscant, fulgid, glinting, glistering, glittering, glittery, scintillant, sparkly |
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| (adjective) brilliantly clever | - |
| (adjective) marked by high spirits or excitement | Synonyms: bubbling, effervescent, frothy, sparkly |
| scintillation | (noun) the quality of shining with a bright reflected light | Synonyms: glisten, glister, glitter, sparkle |
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| (noun) the twinkling of the stars caused when changes in the density of the earth's atmosphere produce uneven refraction of starlight | - |
| (noun) a brilliant display of wit | - |
| (noun) a rapid change in brightness; a brief spark or flash | Synonyms: sparkling, twinkle |
| (noun) (physics) a flash of light that is produced in a phosphor when it absorbs a photon or ionizing particle | - |
| semiskilled | (adjective) possessing or requiring limited skills | - |
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| septillion | (noun) the number that is represented as a one followed by 24 zeros in the US | - |
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| sextillion | (noun) the number that is represented as a one followed by 21 zeros | - |
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| shill | (noun) a decoy who acts as an enthusiastic customer in order to stimulate the participation of others | - |
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| (verb) act as a shill | - |
| shillalah | (noun) a cudgel made of hardwood (usually oak or blackthorn) | Synonyms: shillelagh |
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| shillelagh | (noun) a cudgel made of hardwood (usually oak or blackthorn) | Synonyms: shillalah |
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| shilling | (noun) an English coin worth one twentieth of a pound | - |
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| (noun) a former monetary unit in Great Britain | Synonyms: bob, British shilling |
| (noun) the basic unit of money in Kenya; equal to 100 cents | Synonyms: Kenyan shilling |
| (noun) the basic unit of money in Somalia; equal to 100 cents | Synonyms: Somalian shilling |
| (noun) the basic unit of money in Tanzania; equal to 100 cents | Synonyms: Tanzanian shilling |
| (noun) the basic unit of money in Uganda; equal to 100 cents | Synonyms: Ugandan shilling |
| shillyshally | (noun) the act of procrastinating; putting off or delaying or deferring an action to a later time | Synonyms: cunctation, procrastination |
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| (verb) be uncertain and vague | - |
| (verb) postpone doing what one should be doing | Synonyms: dilly-dally, dillydally, drag one's feet, drag one's heels, procrastinate, stall |
| shoebill | (noun) large stork-like bird of the valley of the White Nile with a broad bill suggesting a wooden shoe | Synonyms: Balaeniceps rex, shoebird |
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| shrill | (adjective) of colors that are bright and gaudy | - |
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| (adjective) having or emitting a high-pitched and sharp tone or tones | Synonyms: sharp |
| (adjective) being sharply insistent on being heard | Synonyms: strident |
| (verb) utter a shrill cry | Synonyms: pipe, pipe up, shriek |
| shrilling | (noun) a continuing shrill noise | - |
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| shrillness | (noun) having the timbre of a loud high-pitched sound | Synonyms: stridence, stridency |
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| (noun) the quality of being sharp or harsh to the senses | - |
| shrilly | (adverb) in a shrill voice | Synonyms: piercingly |
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| sill | (noun) structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure | - |
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| (noun) (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock | - |
| sillabub | (noun) sweetened cream beaten with wine or liquor | Synonyms: syllabub |
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| (noun) spiced hot milk with rum or wine | Synonyms: syllabub |
| silliness | (noun) a ludicrous folly | Synonyms: absurdity, fatuity, fatuousness |
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| (noun) an impulsive scatterbrained manner | Synonyms: giddiness |
| silly | (adjective) dazed from or as if from repeated blows | Synonyms: punch-drunk, slaphappy |
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| (adjective) ludicrous, foolish | Synonyms: goofy, wacky, whacky, zany |
| (adjective) lacking seriousness; given to frivolity | Synonyms: airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded |
| (adjective) inspiring scornful pity | Synonyms: pathetic, ridiculous |
| (noun) a word used for misbehaving children | - |
| skill | (noun) ability to produce solutions in some problem domain | Synonyms: science |
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| (noun) an ability that has been acquired by training | Synonyms: accomplishment, acquirement, acquisition, attainment |
| skilled | (adjective) having or showing or requiring special skill | - |
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| skillessness | (noun) Lack of skill; ineptness. | - |
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| skillet | (noun) a pan used for frying foods | Synonyms: frying pan, frypan |
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| skilletfish | (noun) clingfish with typical skillet shape | Synonyms: Gobiesox strumosus, skillet fish |
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| skillful | (adjective) done with delicacy and skill | Synonyms: nice |
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| (adjective) having or showing knowledge and skill and aptitude | Synonyms: adept, expert, good, practiced, proficient, skilful |
| skillfully | (adverb) with skill | Synonyms: skilfully |
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| skillfulness | (noun) the state of being cognitively skillful | - |
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| skilly | (noun) a thin porridge or soup (usually oatmeal and water flavored with meat) | - |
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| spicemill | (noun) a mill for grinding spices | - |
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| spill | (noun) the act of allowing a fluid to escape | Synonyms: release, spillage |
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| (noun) a sudden drop from an upright position | Synonyms: fall, tumble |
| (noun) a channel that carries excess water over or around a dam or other obstruction | Synonyms: spillway, wasteweir |
| (noun) liquid that is spilled | - |
| (verb) reduce the pressure of wind on (a sail) | - |
| (verb) reveal information | Synonyms: talk |
| (verb) cause or allow (a solid substance) to flow or run out or over | Synonyms: disgorge, shed |
| (verb) pour out in drops or small quantities or as if in drops or small quantities | Synonyms: pour forth, shed |
| (verb) cause or allow (a liquid substance) to run or flow from a container | Synonyms: slop, splatter |
| (verb) flow, run or fall out and become lost | Synonyms: run out |
| spillage | (noun) the act of allowing a fluid to escape | Synonyms: release, spill |
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| (noun) the amount that has spilled | - |
| spiller | (noun) a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys) | Synonyms: setline, trawl, trawl line, trotline |
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| (noun) an attacker who sheds or spills blood | Synonyms: shedder |