| novelette | (noun) a short novel | Synonyms: novella |
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| noviciate | (noun) the period during which you are a novice (especially in a religious order) | Synonyms: novitiate |
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| novitiate | (noun) someone who has entered a religious order but has not taken final vows | Synonyms: novice |
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| (noun) the period during which you are a novice (especially in a religious order) | Synonyms: noviciate |
| numberplate | (noun) a plate mounted on the front and back of car and bearing the car's registration number | Synonyms: license plate |
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| nummulite | (noun) large fossil protozoan of the Tertiary period | - |
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| oblate | (noun) a lay person dedicated to religious work or the religious life | - |
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| octette | (noun) a musical composition written for eight performers | Synonyms: octet |
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| (noun) eight people considered as a unit | Synonyms: eightsome, octet |
| (noun) a set of eight similar things considered as a unit | Synonyms: octet |
| (noun) eight performers or singers who perform together | Synonyms: octet |
| odonate | (noun) large primitive predatory aquatic insect having two pairs of membranous wings | - |
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| oligochaete | (noun) hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body | Synonyms: oligochaete worm |
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| oligodendrocyte | (noun) a cell of the oligodendroglia | - |
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| olivenite | (noun) rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits | - |
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| omelette | (noun) beaten eggs or an egg mixture cooked until just set; may be folded around e.g. ham or cheese or jelly | Synonyms: omelet |
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| oocyte | (noun) a female gametocyte that develops into an ovum after two meiotic divisions | - |
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| opiate | (noun) a narcotic drug that contains opium or an opium derivative | - |
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| opposite | (noun) a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other | Synonyms: antonym, opposite word |
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| (noun) a contestant that you are matched against | Synonyms: opponent, opposition |
| (noun) a relation of direct opposition | Synonyms: contrary, reverse |
| (noun) something inverted in sequence or character or effect | Synonyms: inverse |
| ordinate | (noun) the value of a coordinate on the vertical axis | - |
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| organophosphate | (noun) an insecticide that interferes with an insect's nervous system | - |
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| orthophosphate | (noun) a salt of phosphoric acid | Synonyms: inorganic phosphate, phosphate |
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| osteocyte | (noun) mature bone cell | - |
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| osteophyte | (noun) small abnormal bony outgrowth | - |
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| oubliette | (noun) a dungeon with the only entrance or exit being a trap door in the ceiling | - |
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| outcaste | (noun) a person belonging to no caste | - |
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| overbite | (noun) (dentistry) malocclusion in which the upper teeth extend abnormally far over the lower teeth | - |
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| overestimate | (noun) a calculation that results in an estimate that is too high | Synonyms: overestimation, overrating, overreckoning |
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| (noun) an appraisal that is too high | Synonyms: overappraisal, overestimation, overvaluation |
| oxalacetate | (noun) a salt or ester of oxalacetic acid | Synonyms: oxaloacetate |
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| oxalate | (noun) a salt or ester of oxalic acid | - |
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| oxaloacetate | (noun) a salt or ester of oxalacetic acid | Synonyms: oxalacetate |
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| ozocerite | (noun) a waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum; some varieties are used in making ceresin and candles | Synonyms: ader wax, earth wax, mineral wax, ozokerite |
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| ozokerite | (noun) a waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum; some varieties are used in making ceresin and candles | Synonyms: ader wax, earth wax, mineral wax, ozocerite |
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| palate | (noun) the upper surface of the mouth that separates the oral and nasal cavities | Synonyms: roof of the mouth |
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| palatinate | (noun) a territory under the jurisdiction of a count palatine | - |
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| palette | (noun) board that provides a flat surface on which artists mix paints and the range of colors used | Synonyms: pallet |
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| (noun) one of the rounded armor plates at the armpits of a suit of armor | Synonyms: pallette |
| (noun) the range of colour characteristic of a particular artist or painting or school of art | Synonyms: pallet |
| pallasite | (noun) a meteorite composed principally of olivine and metallic iron | - |
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| pallette | (noun) one of the rounded armor plates at the armpits of a suit of armor | Synonyms: palette |
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| parachute | (noun) rescue equipment consisting of a device that fills with air and retards your fall | Synonyms: chute |
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| paragonite | (noun) a colorless or pale brown mica with sodium | - |
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| parasite | (noun) an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host | - |
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| (noun) a follower who hangs around a host (without benefit to the host) in hope of gain or advantage | Synonyms: leech, sponge, sponger |
| parthenote | (noun) a cell resulting from parthenogenesis | - |
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| particulate | (noun) a small discrete mass of solid or liquid matter that remains individually dispersed in gas or liquid emissions (usually considered to be an atmospheric pollutant) | Synonyms: particulate matter |
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| paste | (noun) a tasty mixture to be spread on bread or crackers or used in preparing other dishes | Synonyms: spread |
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| (noun) an adhesive made from water and flour or starch; used on paper and paperboard | Synonyms: library paste |
| (noun) any mixture of a soft and malleable consistency | - |
| (noun) a hard, brilliant lead glass that is used in making artificial jewelry | - |
| pastorate | (noun) the position of pastor | Synonyms: pastorship |
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| (noun) pastors collectively | - |
| pate | (noun) liver or meat or fowl finely minced or ground and variously seasoned | - |
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| (noun) the top of the head | Synonyms: crown, poll |
| patriarchate | (noun) a form of social organization in which a male is the family head and title is traced through the male line | Synonyms: patriarchy |
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| (noun) the jurisdiction of a patriarch | - |
| patriciate | (noun) members of the patrician class. | - |
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| pearlite | (noun) a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron | - |
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| pebibyte | (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes | Synonyms: PB, petabyte, PiB |
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| pegmatite | (noun) a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements | - |
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| pentathlete | (noun) an athlete who competes in a pentathlon | - |
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| pentlandite | (noun) a mineral (iron and nickel sulphide) that is the chief ore of nickel | - |
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| penultimate | (noun) the next to last syllable in a word | Synonyms: penult, penultima |
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| perchlorate | (noun) a salt of perchloric acid | - |
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| percolate | (noun) the product of percolation | - |
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| peridotite | (noun) a dark coarse-grained igneous rock consisting principally of olivine | - |
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| permanganate | (noun) a dark purple salt of permanganic acid; in water solution it is used as a disinfectant and antiseptic | - |
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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 |
| petabyte | (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes | Synonyms: PB, pebibyte, PiB |
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| (noun) a unit of information equal to 1000 terabytes or 10^15 bytes | Synonyms: PB |
| petite | (noun) a garment size for short or slender women | - |
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| peyote | (noun) the hallucinatory alkaloid that is the active agent in mescal buttons | Synonyms: mescaline |
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| (noun) a small spineless globe-shaped cactus; source of mescal buttons | Synonyms: Lophophora williamsii, mescal, mezcal |
| phagocyte | (noun) a cell that engulfs and digests debris and invading microorganisms | Synonyms: scavenger cell |
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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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| phosphate | (noun) carbonated drink with fruit syrup and a little phosphoric acid | - |
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| (noun) a salt of phosphoric acid | Synonyms: inorganic phosphate, orthophosphate |
| pianoforte | (noun) a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds | Synonyms: forte-piano, piano |
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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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| pipette | (noun) measuring instrument consisting of a graduated glass tube used to measure or transfer precise volumes of a liquid by drawing the liquid up into the tube | Synonyms: pipet |
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| pirate | (noun) a ship that is manned by pirates | Synonyms: pirate ship |
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| (noun) someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation | Synonyms: buccaneer, sea robber, sea rover |
| (noun) someone who uses another person's words or ideas as if they were his own | Synonyms: literary pirate, plagiariser, plagiarist, plagiarizer |
| pirouette | (noun) (ballet) a rapid spin of the body (especially on the toes as in ballet) | - |
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| piste | (noun) a ski run densely packed with snow | - |
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| (noun) a flat rectangular area for fencing bouts | - |
| planchette | (noun) a triangular board supported on casters; when lightly touched with the fingertips it is supposed to spell out supernatural (or unconscious) messages | - |
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| plasmacyte | (noun) a cell that develops from a B lymphocyte in reaction to a specific antigen; found in bone marrow and sometimes in the blood | Synonyms: plasma cell |
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| plate | (noun) dish on which food is served or from which food is eaten | - |
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| (noun) a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners) | Synonyms: scale, shell |
| (noun) a sheet of metal or wood or glass or plastic | - |
| (noun) a shallow receptacle for collection in church | Synonyms: collection plate |
| (noun) (baseball) base consisting of a rubber slab where the batter stands; it must be touched by a base runner in order to score | Synonyms: home, home base, home plate |
| (noun) structural member consisting of a horizontal beam that provides bearing and anchorage | - |
| (noun) a full-page illustration (usually on slick paper) | - |
| (noun) a flat sheet of metal or glass on which a photographic image can be recorded | Synonyms: photographic plate |
| (noun) the positively charged electrode in a vacuum tube | - |
| (noun) a dental appliance that artificially replaces missing teeth | Synonyms: dental plate, denture |
| (noun) any flat platelike body structure or part | - |
| (noun) a main course served on a plate | - |
| (noun) the thin under portion of the forequarter | - |
| (noun) a rigid layer of the Earth's crust that is believed to drift slowly | Synonyms: crustal plate |
| (noun) the quantity contained in a plate | Synonyms: plateful |
| playmate | (noun) a companion at play | Synonyms: playfellow |
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| plebiscite | (noun) a vote by the electorate determining public opinion on a question of national importance | - |
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| pleonaste | (noun) a dark-colored spinel containing iron | Synonyms: ceylonite |
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| pollucite | (noun) a rare mineral that is an important source of cesium | - |
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| polychaete | (noun) chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles | Synonyms: polychaete worm, polychete, polychete worm |
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| polychete | (noun) chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles | Synonyms: polychaete, polychaete worm, polychete worm |
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| polyelectrolyte | (noun) an electrolyte of high molecular weight | - |
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| polymastigote | (noun) flagellates with several flagella | - |
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| polyphosphate | (noun) a salt or ester of polyphosphoric acid | - |
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| pomegranate | (noun) large globular fruit having many seeds with juicy red pulp in a tough brownish-red rind | - |
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| (noun) shrub or small tree native to southwestern Asia having large red many-seeded fruit | Synonyms: pomegranate tree, Punica granatum |
| pontificate | (noun) the government of the Roman Catholic Church | Synonyms: papacy |
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| postgraduate | (noun) a student who continues studies after graduation | Synonyms: grad student, graduate student |
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| postulate | (noun) (logic) a proposition that is accepted as true in order to provide a basis for logical reasoning | Synonyms: posit |
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| potentate | (noun) a ruler who is unconstrained by law | Synonyms: dictator |
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| poulette | (noun) allemande sauce with chopped parsley | - |
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| prate | (noun) idle or foolish and irrelevant talk | Synonyms: blether, chin music, idle talk, prattle |
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| precipitate | (noun) a precipitated solid substance in suspension or after settling or filtering | - |
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| predicate | (noun) one of the two main constituents of a sentence; the predicate contains the verb and its complements | Synonyms: verb phrase |
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| (noun) (logic) what is predicated of the subject of a proposition; the second term in a proposition is predicated of the first term by means of the copula | - |
| prelate | (noun) a senior clergyman and dignitary | Synonyms: archpriest, hierarch, high priest, primate |
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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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| primate | (noun) any placental mammal of the order Primates; has good eyesight and flexible hands and feet | - |
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| (noun) a senior clergyman and dignitary | Synonyms: archpriest, hierarch, high priest, prelate |
| private | (noun) an enlisted man of the lowest rank in the Army or Marines | Synonyms: buck private, common soldier |
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| probate | (noun) the act of proving that an instrument purporting to be a will was signed and executed in accord with legal requirements | - |
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| (noun) a judicial certificate saying that a will is genuine and conferring on the executors the power to administer the estate | Synonyms: probate will |
| procaryote | (noun) a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma | Synonyms: prokaryote |
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| proconsulate | (noun) the position of proconsul | Synonyms: proconsulship |
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| profligate | (noun) a dissolute man in fashionable society | Synonyms: blood, rake, rakehell, rip, roue |
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| (noun) a recklessly extravagant consumer | Synonyms: prodigal, squanderer |
| prokaryote | (noun) a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma | Synonyms: procaryote |
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| propenoate | (noun) a salt or ester of propenoic acid | Synonyms: acrylate |
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