| parlormaid | (noun) a maid in a private home whose duties are to care for the parlor and the table and to answer the door | Synonyms: parlourmaid |
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| parlourmaid | (noun) a maid in a private home whose duties are to care for the parlor and the table and to answer the door | Synonyms: parlormaid |
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| parotid | (adjective) relating to or located near the parotid gland | - |
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| pellucid | (adjective) (of language) transparently clear; easily understandable | Synonyms: crystal clear, limpid, lucid, luculent, perspicuous |
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| (adjective) transmitting light; able to be seen through with clarity | Synonyms: crystal clear, crystalline, limpid, lucid, transparent |
| pentastomid | (noun) wormlike arthropod having two pairs of hooks at the sides of the mouth; parasitic in nasal sinuses of mammals | Synonyms: tongue worm |
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| percoid | (noun) any of numerous spiny-finned fishes of the order Perciformes | Synonyms: percoid fish, percoidean |
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| perfervid | (adjective) characterized by intense emotion | Synonyms: ardent, fervent, fervid, fiery, impassioned, torrid |
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| petaloid | (adjective) resembling a flower petal | - |
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| phasianid | (noun) a kind of game bird in the family Phasianidae | - |
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| phasmid | (noun) large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insects | Synonyms: phasmid insect |
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| phoronid | (noun) hermaphrodite wormlike animal living in mud of the sea bottom | - |
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| phospholipid | (noun) any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membranes | - |
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| pierid | (noun) any of numerous pale-colored butterflies having three pairs of well-developed legs | Synonyms: pierid butterfly |
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| pinnatifid | (adjective) (of a leaf shape) cleft nearly to the midrib in broad divisions not separated into distinct leaflets | - |
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| placid | (adjective) (of a body of water) free from disturbance by heavy waves | Synonyms: quiet, smooth, still, tranquil, unruffled |
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| (adjective) not easily irritated | Synonyms: equable, even-tempered, good-tempered |
| placoid | (adjective) as the hard flattened scales of e.g. sharks | Synonyms: platelike |
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| plaid | (noun) a cloth having a crisscross design | Synonyms: tartan |
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| planetoid | (noun) any of numerous small celestial bodies that move around the sun | Synonyms: minor planet |
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| plasmid | (noun) a small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication | Synonyms: plasmid DNA |
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| plastid | (noun) any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein | - |
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| poeciliid | (noun) small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control | Synonyms: live-bearer, poeciliid fish, topminnow |
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| polyploid | (adjective) of a cell or organism having more than twice the haploid number of chromosomes | - |
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| (noun) (genetics) an organism or cell having more than twice the haploid number of chromosomes | - |
| pongid | (noun) any of the large anthropoid apes of the family Pongidae | Synonyms: great ape |
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| postpaid | (adjective) used especially of mail; paid in advance | Synonyms: prepaid |
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| prepaid | (adjective) used especially of mail; paid in advance | Synonyms: postpaid |
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| prismatoid | (noun) a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid | - |
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| prismoid | (noun) a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms | - |
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| probenecid | (noun) a uricosuric drug that reduces the level of uric acid in the blood; used to treat gout | - |
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| procyonid | (noun) plantigrade carnivorous mammals | - |
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| psocid | (noun) small winged insect living on the bark and leaves of trees and feeding on e.g. fungi and decaying plant matter | - |
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| psychodid | (noun) a fly of the family Psychodidae | - |
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| psyllid | (noun) small active cicada-like insect with hind legs adapted for leaping; feeds on plant juices | Synonyms: jumping plant louse, psylla |
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| putrid | (adjective) of or relating to or attended by putrefaction | - |
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| (adjective) morally corrupt or evil | - |
| (adjective) in an advanced state of decomposition and having a foul odor | - |
| pycnogonid | (noun) any of various small spiderlike marine arthropods having small thin bodies and long slender legs | Synonyms: sea spider |
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| pyralid | (noun) usually tropical slender-bodied long-legged moth whose larvae are crop pests | Synonyms: pyralid moth |
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| pyramid | (noun) (stock market) a series of transactions in which the speculator increases his holdings by using the rising market value of those holdings as margin for further purchases | - |
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| (noun) a polyhedron having a polygonal base and triangular sides with a common vertex | - |
| (verb) increase rapidly and progressively step by step on a broad base | - |
| (verb) arrange or build up as if on the base of a pyramid | - |
| (verb) enlarge one's holdings on an exchange on a continued rise by using paper profits as margin to buy additional amounts | - |
| (verb) use or deal in (as of stock or commercial transaction) in a pyramid deal | - |
| quid | (noun) a wad of something chewable as tobacco | Synonyms: chaw, chew, cud, plug, wad |
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| (noun) something for something; that which a party receives (or is promised) in return for something he does or gives or promises | Synonyms: quid pro quo |
| (noun) the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence | Synonyms: British pound, British pound sterling, pound, pound sterling |
| rabid | (adjective) of or infected by rabies | - |
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| (adjective) marked by excessive enthusiasm for and intense devotion to a cause or idea | Synonyms: fanatic, fanatical, overzealous |
| raid | (noun) a sudden short attack | Synonyms: foray, maraud |
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| (noun) an attempt by speculators to defraud investors | - |
| (verb) search for something needed or desired | - |
| (verb) enter someone else's territory and take spoils | Synonyms: foray into |
| (verb) take over (a company) by buying a controlling interest of its stock | - |
| (verb) search without warning, make a sudden surprise attack on | Synonyms: bust |
| rancid | (adjective) smelling of fermentation or staleness | Synonyms: sour |
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| (adjective) (used of decomposing oils or fats) having a rank smell or taste usually due to a chemical change or decomposition | - |
| ranid | (noun) insectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs | Synonyms: true frog |
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| rapid | (adjective) done or occurring in a brief period of time | - |
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| (adjective) characterized by speed; moving with or capable of moving with high speed | Synonyms: speedy |
| (noun) a part of a river where the current is very fast | - |
| rectosigmoid | (adjective) of or related to or near the sigmoid colon and the upper part of the rectum | - |
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| reduviid | (noun) a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals | Synonyms: assassin bug |
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| resid | (noun) oil products that remain after petroleum has been distilled | Synonyms: residual oil |
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| resinoid | (noun) a plastic containing resins | - |
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| rheumatoid | (adjective) of or pertaining to arthritis | Synonyms: arthritic, creaky, rheumatic, rheumy |
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| rhizoid | (noun) any of various slender filaments that function as roots in mosses and ferns and fungi etc | - |
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| rhomboid | (adjective) shaped like a rhombus or rhomboid | Synonyms: rhomboidal |
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| (noun) any of several muscles of the upper back that help move the shoulder blade | Synonyms: rhomboid muscle |
| (noun) a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal | - |
| rid | (verb) relieve from | Synonyms: disembarrass, free |
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| rigid | (adjective) designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure | - |
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| (adjective) incapable of or resistant to bending | Synonyms: stiff |
| (adjective) incapable of compromise or flexibility | Synonyms: strict |
| (adjective) fixed and unmoving | Synonyms: fixed, set |
| (adjective) incapable of adapting or changing to meet circumstances | Synonyms: inflexible, unbending |
| said | (adjective) being the one previously mentioned or spoken of | Synonyms: aforementioned, aforesaid |
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| salmonid | (noun) soft-finned fishes of cold and temperate waters | - |
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| sapid | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavorsome, flavourful, flavourous, flavoursome, saporous |
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| sarcoid | (adjective) of or relating to or resembling flesh | Synonyms: fleshy |
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| sarcoptid | (noun) whitish mites that attack the skin of humans and other animals | Synonyms: itch mite |
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| saturniid | (noun) large brightly colored and usually tropical moth; larvae spin silken cocoons | Synonyms: saturniid moth |
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| scaphoid | (adjective) shaped like a boat | Synonyms: navicular |
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| scarabaeid | (noun) any of numerous species of stout-bodied beetles having heads with horny spikes | Synonyms: scarabaean, scarabaeid beetle |
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| schizoid | (adjective) of or relating to or characteristic of schizophrenia | Synonyms: schizophrenic |
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| (adjective) marked by withdrawal and inability to form close relationships | - |
| (noun) characterized by symptoms similar to but less severe than schizophrenia | Synonyms: schizotypal personality |
| sciaenid | (noun) widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound | Synonyms: sciaenid fish |
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| sciarid | (noun) minute blackish gregarious flies destructive to mushrooms and seedlings | Synonyms: fungus gnat, sciara |
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| scincid | (noun) alert agile lizard with reduced limbs and an elongated body covered with shiny scales; more dependent on moisture than most lizards; found in tropical regions worldwide | Synonyms: scincid lizard, skink |
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| scombroid | (noun) important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters | Synonyms: scombroid fish |
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| scorpaenid | (noun) any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific | Synonyms: scorpaenid fish |
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| scorpaenoid | (noun) fishes having the head armored with bony plates | Synonyms: scorpaenoid fish |
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| seid | (noun) an Old Norse term for a type of sorcery which was practiced in Norse society during the Late Scandinavian Iron Age. | Synonyms: seidh, seidhr, seidr, seith, seithr |
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| semiarid | (adjective) somewhat arid | - |
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| semiliquid | (adjective) somewhat liquid | - |
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| semirigid | (adjective) not fully rigid | - |
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| (adjective) having a form maintained by a rigid internal structure as well as by internal gas pressure | - |
| semisolid | (adjective) partly solid; having a rigidity and viscosity intermediate between a solid and a liquid | - |
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| sepaloid | (adjective) resembling or characteristic of a sepal | Synonyms: sepaline |
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| serranid | (noun) marine food sport fishes mainly of warm coastal waters | Synonyms: serranid fish |
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| sesamoid | (noun) any of several small round bones formed in a tendon where it passes over a joint | Synonyms: os sesamoideum, sesamoid bone |
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| sigmoid | (adjective) of or relating to the sigmoid flexure in the large intestine | Synonyms: sigmoidal |
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| (adjective) curved in two directions (like the letter S) | - |
| silurid | (noun) Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin | Synonyms: silurid fish |
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| sinusoid | (noun) tiny endothelium-lined passages for blood in the tissue of an organ | - |
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| (noun) the curve of y=sin x | Synonyms: sine curve |
| sipunculid | (noun) small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut | Synonyms: peanut worm |
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| skid | (noun) an unexpected slide | Synonyms: sideslip, slip |
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| (noun) one of a pair of planks used to make a track for rolling or sliding objects | - |
| (noun) a restraint provided when the brake linings are moved hydraulically against the brake drum to retard the wheel's rotation | Synonyms: brake shoe, shoe |
| (verb) move obliquely or sideways, usually in an uncontrolled manner | Synonyms: slew, slide, slip, slue |
| (verb) apply a brake or skid to | - |
| (verb) elevate onto skids | - |
| (verb) slide without control | - |
| solenoid | (noun) a coil of wire around an iron core; becomes a magnet when current passes through the coil | - |
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| solid | (adjective) of definite shape and volume; firm; neither liquid nor gaseous | - |
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| (adjective) entirely of one substance with no holes inside | - |
| (adjective) having length, breadth and thickness | - |
| (adjective) characterized by good substantial quality | - |
| (adjective) not soft or yielding to pressure | Synonyms: firm |
| (adjective) of one substance or character throughout | - |
| (adjective) impenetrable for the eye | - |
| (adjective) meriting respect or esteem | Synonyms: upstanding |
| (adjective) of a substantial character and not frivolous or superficial | - |
| (adjective) financially dependable | - |
| (adjective) of good quality and condition; solidly built | Synonyms: strong, substantial |
| (adjective) uninterrupted in space; having no gaps or breaks | - |
| (adjective) acting together as a single undiversified whole | Synonyms: unanimous, whole |
| (adjective) providing abundant nourishment | Synonyms: hearty, satisfying, square, substantial |
| (adjective) of the same color throughout | Synonyms: self-colored, self-coloured |
| (noun) a three-dimensional object, structurally rigid, usually resistant to changes of shape or volume | - |
| (noun) the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape | Synonyms: solid state, solidness |
| (noun) matter that is solid at room temperature and pressure | - |
| sordid | (adjective) meanly avaricious and mercenary | - |
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| (adjective) unethical or dishonest | Synonyms: dirty, shoddy |
| (adjective) foul and run-down and repulsive | Synonyms: flyblown, squalid |
| (adjective) morally degraded | Synonyms: seamy, seedy, sleazy, squalid |
| sparid | (noun) spiny-finned food fishes of warm waters having well-developed teeth | Synonyms: sparid fish |
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| spermatid | (noun) an immature gamete produced by a spermatocyte; develops into a 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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| sphecoid | (noun) any of various solitary wasps | Synonyms: sphecoid wasp |
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| sphenoid | (noun) butterfly-shaped bone at the base of the skull | Synonyms: os sphenoidale, sphenoid bone |
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| spheroid | (noun) a shape that is generated by rotating an ellipse around one of its axes | Synonyms: ellipsoid of revolution |
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| sphingid | (noun) any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed | Synonyms: hawk moth, hawkmoth, hummingbird moth, sphinx moth |
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| splendid | (adjective) having great beauty and splendor | Synonyms: glorious, resplendent, splendiferous |
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| (adjective) characterized by grandeur | Synonyms: brilliant, glorious, magnificent |
| (adjective) very good; of the highest quality | Synonyms: excellent, fantabulous, first-class, mean, ripping |
| squalid | (adjective) foul and run-down and repulsive | Synonyms: flyblown, sordid |
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| (adjective) morally degraded | Synonyms: seamy, seedy, sleazy, sordid |
| squid | (noun) widely distributed fast-moving ten-armed cephalopod mollusk having a long tapered body with triangular tail fins | - |
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| (noun) (Italian cuisine) squid prepared as food | Synonyms: calamari, calamary |
| staid | (adjective) characterized by dignity and propriety | Synonyms: sedate |
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| sternocleidomastoid | (noun) one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the head | Synonyms: musculus sternocleidomastoideus, sternocleido mastoideus, sternocleidomastoid muscle |
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| steroid | (noun) any of several fat-soluble organic compounds having as a basis 17 carbon atoms in four rings; many have important physiological effects | - |
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| (noun) any hormone affecting the development and growth of sex organs | Synonyms: sex hormone, steroid hormone |
| stolid | (adjective) having or revealing little emotion or sensibility; not easily aroused or excited | Synonyms: impassive |
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| stromateid | (noun) small marine fish with a short compressed body and feeble spines | Synonyms: butterfish, stromateid fish |
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| stupid | (adjective) lacking or marked by lack of intellectual acuity | - |
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| (adjective) lacking intelligence | Synonyms: unintelligent |
| (adjective) in a state of mental numbness especially as resulting from shock | Synonyms: dazed, stunned, stupefied |
| (noun) a person who is not very bright | Synonyms: dolt, dullard, pillock, poor fish, pudden-head, pudding head, stupe, stupid person |
| subacid | (adjective) slightly sour to the taste | - |
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| symphilid | (noun) minute arthropod often infesting the underground parts of truck-garden and greenhouse crops | Synonyms: garden centipede, garden symphilid, Scutigerella immaculata |
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