| ontogeny | (noun) (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level | Synonyms: development, growing, growth, maturation, ontogenesis |
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| onycholysis | (noun) separation of a nail from its normal attachment to the nail bed | - |
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| onychophoran | (noun) any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms | Synonyms: peripatus, velvet worm |
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| onychosis | (noun) any disease or disorder of the nails | - |
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| onymous | (adjective) bearing a name | - |
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| onyx | (noun) a chalcedony with alternating black and white bands; used in making cameos | - |
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| onyxis | (noun) toenail having its free tip or edges embedded in the surrounding flesh | Synonyms: ingrown toenail |
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| orogeny | (noun) the process of mountain formation (especially by the upward displacement of the earth's crust) | - |
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| paeony | (noun) any of numerous plants widely cultivated for their showy single or double red or pink or white flowers | Synonyms: peony |
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| palaeobotany | (noun) the study of fossil plants | Synonyms: paleobotany |
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| paleobotany | (noun) the study of fossil plants | Synonyms: palaeobotany |
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| palimony | (noun) support paid by one half of an unmarried partnership after the relationship ends | - |
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| paronychia | (noun) infection in the tissues adjacent to a nail on a finger or toe | - |
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| paronym | (noun) a word that strongly resembles another word in spelling | - |
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| parsimony | (noun) extreme care in spending money; reluctance to spend money unnecessarily | Synonyms: parsimoniousness, penny-pinching, thrift |
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| (noun) extreme stinginess | Synonyms: closeness, meanness, minginess, niggardliness, niggardness, parsimoniousness, tightfistedness, tightness |
| parthenogeny | (noun) process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods | Synonyms: parthenogenesis |
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| (noun) human conception without fertilization by a man | Synonyms: parthenogenesis, virgin birth |
| patrimony | (noun) an inheritance coming by right of birth (especially by primogeniture) | Synonyms: birthright |
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| (noun) a church endowment | - |
| patronym | (noun) a family name derived from name of your father or a paternal ancestor (especially with an affix (such as -son in English or O'- in Irish) added to the name of your father or a paternal ancestor) | Synonyms: patronymic |
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| patronymic | (adjective) of or derived from a personal or family name | - |
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| (noun) a family name derived from name of your father or a paternal ancestor (especially with an affix (such as -son in English or O'- in Irish) added to the name of your father or a paternal ancestor) | Synonyms: patronym |
| penny | (noun) a coin worth one-hundredth of the value of the basic unit | Synonyms: cent, centime |
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| (noun) a fractional monetary unit of Ireland and the United Kingdom; equal to one hundredth of a pound | - |
| pennycress | (noun) any of several plants of the genus Thlaspi | - |
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| pennyroyal | (noun) Eurasian perennial mint have small lilac-blue flowers and ovate leaves; yields an aromatic oil | Synonyms: Mentha pulegium |
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| (noun) erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine | Synonyms: American pennyroyal, Hedeoma pulegioides |
| pennyweight | (noun) a unit of apothecary weight equal to 24 grains | - |
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| pennywhistle | (noun) an inexpensive fipple flute | Synonyms: tin whistle, whistle |
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| pennyworth | (noun) the amount that can be bought for a penny | Synonyms: penn'orth |
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| peony | (noun) any of numerous plants widely cultivated for their showy single or double red or pink or white flowers | Synonyms: paeony |
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| pertainym | (noun) meaning relating to or pertaining to | - |
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| phenylacetamide | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilid, acetanilide |
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| phenylalanine | (noun) an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body | - |
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| phenylamine | (noun) oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines | Synonyms: aminobenzine, aniline, aniline oil |
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| phenylbutazone | (noun) anti-inflammatory drug (trade name Butazolidin) | Synonyms: Butazolidin |
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| phenylephrine | (noun) a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion | - |
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| phenylethylene | (noun) a colorless oily liquid; the monomer for polystyrene | Synonyms: cinnamene, styrene, vinylbenzene |
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| phenylketonuria | (noun) a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency | Synonyms: PKU |
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| phenylpropanolamine | (noun) an adrenergic drug used in many preparations to relieve allergic reactions or respiratory infections | - |
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| phenyltoloxamine | (noun) antihistamine included in some preparations used to treat coughing and nasal congestion | - |
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| phenytoin | (noun) an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative | Synonyms: Dilantin, diphenylhydantoin |
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| philogyny | (noun) admiration for women | - |
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| phony | (adjective) fraudulent; having a misleading appearance | Synonyms: bastard, bogus, fake, phoney |
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| (noun) a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives | Synonyms: dissembler, dissimulator, hypocrite, phoney, pretender |
| phylogeny | (noun) (biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms | Synonyms: evolution, organic evolution, phylogenesis |
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| picaninny | (noun) (ethnic slur) offensive term for a Black child | Synonyms: piccaninny, pickaninny |
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| piccaninny | (noun) (ethnic slur) offensive term for a Black child | Synonyms: picaninny, pickaninny |
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| pickaninny | (noun) (ethnic slur) offensive term for a Black child | Synonyms: picaninny, piccaninny |
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| pikeblenny | (noun) tropical American fishes; males are aggressively defensive of their territory | - |
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| pinny | (noun) a sleeveless dress resembling an apron; worn over other clothing | Synonyms: jumper, pinafore |
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| pinyon | (noun) any of several low-growing pines of western North America | Synonyms: pinon |
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| polony | (noun) another name for Bologna sausage | - |
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| polygyny | (noun) a form of polygamy in which a man has multiple wives | - |
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| polynya | (noun) a stretch of open water surrounded by ice (especially in Arctic seas) | - |
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| polyphony | (noun) music arranged in parts for several voices or instruments | Synonyms: concerted music, polyphonic music |
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| pony | (noun) any of various breeds of small gentle horses usually less than five feet high at the shoulder | - |
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| (noun) a range horse of the western United States | - |
| (noun) an informal term for a racehorse | - |
| (noun) a small glass adequate to hold a single swallow of whiskey | Synonyms: jigger, shot glass |
| (noun) a literal translation used in studying a foreign language (often used illicitly) | Synonyms: crib, trot |
| ponycart | (noun) a cart with an underslung axle and two seats | Synonyms: donkey cart, pony cart, tub-cart |
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| ponytail | (noun) a hair style that draws the hair back so that it hangs down in back of the head like a pony's tail | - |
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| progeny | (noun) the immediate descendants of a person | Synonyms: issue, offspring |
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| pseudonym | (noun) a fictitious name used when the person performs a particular social role | Synonyms: anonym, nom de guerre |
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| pseudonymous | (adjective) bearing or identified by an assumed (often pen) name | - |
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| punny | (adjective) provoking laughter by means of word play | - |
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| puny | (adjective) (used especially of persons) of inferior size | Synonyms: runty, shrimpy |
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| (adjective) inferior in strength or significance | - |
| pyrotechny | (noun) the craft of making fireworks | Synonyms: pyrotechnics |
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| quadraphony | (noun) a stereophonic sound recording or reproducing system using four separate channels | Synonyms: quadraphonic system, quadriphonic system |
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| radiotelephony | (noun) telephony that uses transmission by radio rather than by wire | Synonyms: radiotelephone, wireless telephone |
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| rainy | (adjective) (of weather) wet by periods of rain | Synonyms: showery |
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| rajanya | (noun) the second highest of the four varnas: the noble or warrior category | - |
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| resiny | (adjective) having the characteristics of pitch or tar | Synonyms: pitchy, resinous, tarry |
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| retronym | (noun) a word introduced because an existing term has become inadequate | - |
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| ribbony | (adjective) long and thin; resembling a ribbon | Synonyms: ribbonlike |
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| runny | (adjective) characteristic of a fluid; capable of flowing and easily changing shape | Synonyms: fluid |
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| sanctimony | (noun) the quality of being hypocritically devout | Synonyms: sanctimoniousness |
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| sannyasi | (noun) a Hindu religious mendicant | Synonyms: sannyasin, sanyasi |
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| sannyasin | (noun) a Hindu religious mendicant | Synonyms: sannyasi, sanyasi |
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| sanyasi | (noun) a Hindu religious mendicant | Synonyms: sannyasi, sannyasin |
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| sardonyx | (noun) an onyx characterized by parallel layers of sard and a different colored mineral | - |
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| satiny | (adjective) having a smooth, gleaming surface reflecting light; being of a smooth, soft and lustrous quality, resembling silk | Synonyms: silken, silklike, silky, sleek, slick |
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| scammony | (noun) twining plant of Asia Minor having cream-colored to purple flowers and long thick roots yielding a cathartic resin | Synonyms: Convolvulus scammonia |
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| (noun) resin from the root of Convolvulus scammonia | - |
| (noun) tropical American morning glory | Synonyms: Ipomoea orizabensis |
| scammonyroot | (noun) tropical American prostrate or climbing herbaceous perennial having an enormous starchy root; sometimes held to be source of the sweet potato | Synonyms: Ipomoea fastigiata, Ipomoea panurata, man-of-the-earth, manroot, wild potato vine, wild sweet potato vine |
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| schizogony | (noun) asexual reproduction by multiple fission; characteristic of many sporozoan protozoans | - |
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| scrawny | (adjective) inferior in size or quality | Synonyms: scrubby, stunted |
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| (adjective) being very thin | Synonyms: boney, bony, scraggly, scraggy, skinny, underweight, weedy |
| scrutiny | (noun) the act of examining something closely (as for mistakes) | Synonyms: examination |
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| (noun) a prolonged intense look | - |
| shanny | (noun) European scaleless blenny | Synonyms: Blennius pholis |
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| shawny | (noun) showy perennial herb with white flowers; leaves sometimes used as edible greens in southeastern United States | Synonyms: Hydrophyllum virginianum, Indian salad, John's cabbage, Shawnee salad, Virginia waterleaf |
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| sheeny | (adjective) reflecting light | Synonyms: glistening, glossy, lustrous, shining, shiny |
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| (noun) (ethnic slur) offensive term for a Jew | Synonyms: hymie, kike, yid |
| shinny | (noun) a simple version of hockey played by children on the streets (or on ice or on a field) using a ball or can as the puck | Synonyms: shinney |
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| (verb) climb awkwardly, as if by scrambling | Synonyms: clamber, scramble, shin, skin, sputter, struggle |
| shiny | (adjective) having a shiny surface or coating | Synonyms: glazed |
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| (adjective) reflecting light | Synonyms: glistening, glossy, lustrous, sheeny, shining |
| (adjective) made smooth and bright by or as if by rubbing; reflecting a sheen or glow | Synonyms: bright, burnished, lustrous, shining |
| simony | (noun) traffic in ecclesiastical offices or preferments | Synonyms: barratry |
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| sixpenny | (adjective) of trifling worth | Synonyms: threepenny, tuppeny, two-a-penny, twopenny-halfpenny, twopenny |
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| skinny | (adjective) of or relating to or resembling skin | - |
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| (adjective) giving or spending with reluctance | Synonyms: cheeseparing, close, near, penny-pinching |
| (adjective) being very thin | Synonyms: boney, bony, scraggly, scraggy, scrawny, underweight, weedy |
| (adjective) fitting snugly | Synonyms: tight-fitting, tight fitting, tightfitting, tightly fitting |
| (noun) confidential information about a topic or person | - |
| snakeblenny | (noun) found in Arctic and northern Atlantic waters | Synonyms: Lumpenus lumpretaeformis |
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| sonny | (noun) a male child (a familiar term of address to a boy) | Synonyms: cub, lad, laddie, sonny boy |
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| spiny | (adjective) having spines | Synonyms: spinous |
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| (adjective) having or covered with protective barbs or quills or spines or thorns or setae etc. | Synonyms: barbed, barbellate, briary, briery, bristled, bristly, burred, burry, prickly, setaceous, setose, thorny |
| stereophony | (noun) reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound | Synonyms: stereo, stereo system, stereophonic system |
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| stony | (adjective) hard as granite | Synonyms: granitelike, granitic, rocklike |
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| (adjective) showing unfeeling resistance to tender feelings | Synonyms: flint, flinty, granitic, obdurate |
| (adjective) abounding in rocks or stones | Synonyms: bouldered, bouldery, rocky |
| stonyhearted | (adjective) devoid of feeling for others | Synonyms: hardhearted, unfeeling |
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| succinylcholine | (noun) a muscle relaxant for striated muscle that is used as an adjunct to anesthesia during certain surgical procedures | - |
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| sulfonylurea | (noun) antidiabetic consisting of any of several drugs that reduce the level of glucose in the blood; used to treat diabetes mellitus | - |
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| sunny | (adjective) bright and pleasant; promoting a feeling of cheer | Synonyms: cheery, gay |
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| symphony | (noun) a long and complex sonata for symphony orchestra | Synonyms: symphonic music |
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| (noun) a large orchestra; can perform symphonies | Synonyms: philharmonic, symphony orchestra |
| synchrony | (noun) the relation that exists when things occur at the same time | Synonyms: synchroneity, synchronicity, synchronisation, synchronism, synchronization, synchronizing |
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| synonym | (noun) two words that can be interchanged in a context are said to be synonymous relative to that context | Synonyms: equivalent word |
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| synonymist | (noun) a student of synonyms | - |
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| synonymity | (noun) the semantic relation that holds between two words that can (in a given context) express the same meaning | Synonyms: synonymousness, synonymy |
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