| peristome | (noun) region around the mouth in various invertebrates | - |
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| (noun) (botany) fringe of toothlike appendages surrounding the mouth of a moss capsule | - |
| peristyle | (noun) a colonnade surrounding a building or enclosing a court | - |
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| perithecium | (noun) flask-shaped ascocarp | - |
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| perithelium | (noun) tissue layer around small blood vessels | - |
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| peritoneum | (noun) a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera | - |
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| peritonitis | (noun) inflammation of the peritoneum | Synonyms: peritoneal inflammation |
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| periwig | (noun) a wig for men that was fashionable in the 17th and 18th centuries | Synonyms: peruke |
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| periwinkle | (noun) edible marine gastropod | Synonyms: winkle |
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| (noun) small edible marine snail; steamed in wine or baked | Synonyms: winkle |
| (noun) chiefly trailing poisonous plants with blue flowers | - |
| (noun) commonly cultivated Old World woody herb having large pinkish to red flowers | Synonyms: Cape periwinkle, Catharanthus roseus, cayenne jasmine, Madagascar periwinkle, old maid, red periwinkle, rose periwinkle, Vinca rosea |
| perjurer | (noun) a person who deliberately gives false testimony | Synonyms: false witness |
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| perjury | (noun) criminal offense of making false statements under oath | Synonyms: bearing false witness, lying under oath |
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| perk | (noun) an incidental benefit awarded for certain types of employment (especially if it is regarded as a right) | Synonyms: fringe benefit, perquisite |
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| perkiness | (noun) inappropriate playfulness | Synonyms: archness, impertinence, pertness, sauciness |
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| (noun) cheerfulness that bubbles to the surface | Synonyms: buoyancy |
| perleche | (noun) a disorder of the lips marked by scaling and fissures at the corners of the mouth; caused by a deficiency of riboflavin | Synonyms: cheilosis |
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| perm | (noun) a series of waves in the hair made by applying heat and chemicals | Synonyms: permanent, permanent wave |
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| permafrost | (noun) ground that is permanently frozen | - |
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| permanence | (noun) the property of being able to exist for an indefinite duration | Synonyms: permanency |
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| permanency | (noun) the property of being able to exist for an indefinite duration | Synonyms: permanence |
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| permanent | (noun) a series of waves in the hair made by applying heat and chemicals | Synonyms: perm, permanent wave |
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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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| permeability | (noun) the property of something that can be pervaded by a liquid (as by osmosis or diffusion) | Synonyms: permeableness |
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| permeableness | (noun) the property of something that can be pervaded by a liquid (as by osmosis or diffusion) | Synonyms: permeability |
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| permeation | (noun) mutual penetration; diffusion of each through the other | Synonyms: interpenetration |
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| (noun) the process of permeating or infusing something with a substance | Synonyms: pervasion, suffusion |
| permissibility | (noun) admissibility as a consequence of being permitted | - |
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| permission | (noun) the act of giving a formal (usually written) authorization | Synonyms: license, permit |
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| (noun) approval to do something | - |
| permissiveness | (noun) a disposition to allow freedom of choice and behavior | Synonyms: tolerance |
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| permissivism | (noun) lenience toward or indulgence of a wide variety of social behavior. | - |
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| permit | (noun) the act of giving a formal (usually written) authorization | Synonyms: license, permission |
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| (noun) large game fish; found in waters of the West Indies | Synonyms: Trachinotus falcatus |
| (noun) a legal document giving official permission to do something | Synonyms: licence, license |
| permutability | (noun) ability to change sequence | Synonyms: permutableness, transposability |
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| permutableness | (noun) ability to change sequence | Synonyms: permutability, transposability |
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| permutation | (noun) complete change in character or condition | - |
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| (noun) the act of changing the arrangement of a given number of elements | - |
| (noun) act of changing the lineal order of objects in a group | - |
| (noun) an event in which one thing is substituted for another | Synonyms: replacement, substitution, switch, transposition |
| perniciousness | (noun) grave harmfulness or deadliness | Synonyms: toxicity |
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| pernio | (noun) inflammation of the hands and feet caused by exposure to cold and moisture | Synonyms: chilblain, chilblains |
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| peroneus | (noun) muscle of the lower leg that is involved in moving the foot | - |
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| peroration | (noun) (rhetoric) the concluding section of an oration | - |
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| (noun) a flowery and highly rhetorical oration | - |
| peroxidase | (noun) any of a group of enzymes (occurring especially in plant cells) that catalyze the oxidation of a compound by a peroxide | - |
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| peroxide | (noun) a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels | Synonyms: hydrogen peroxide |
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| (noun) an inorganic compound containing the divalent ion -O-O- | - |
| perpendicular | (noun) an extremely steep face | - |
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| (noun) a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point | Synonyms: plumb line |
| (noun) a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting | Synonyms: English-Gothic, English-Gothic architecture, perpendicular style |
| (noun) a straight line at right angles to another line | - |
| perpendicularity | (noun) the quality of being at right angles to a given line or plane (especially the plane of the horizon) | - |
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| (noun) the relation of opposition between things at right angles | Synonyms: orthogonal opposition, orthogonality |
| perpetration | (noun) the act of committing a crime | Synonyms: commission, committal |
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| perpetrator | (noun) someone who perpetrates wrongdoing | Synonyms: culprit |
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| perpetuation | (noun) the act of prolonging something | Synonyms: lengthening, prolongation, protraction |
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| perpetuity | (noun) the property of being perpetual (seemingly ceaseless) | Synonyms: sempiternity |
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| perphenazine | (noun) tranquilizer and antidepressant (trade name Triavil) sometimes used as an antiemetic for adults | Synonyms: Triavil |
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| perplexity | (noun) trouble or confusion resulting from complexity | - |
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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 |
| perry | (noun) a fermented and often effervescent beverage made from juice of pears; similar in taste to hard cider | - |
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| persecution | (noun) the act of persecuting (especially on the basis of race or religion) | - |
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| persecutor | (noun) someone who torments | Synonyms: tormenter, tormentor |
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| perseverance | (noun) the act of persisting or persevering; continuing or repeating behavior | Synonyms: perseveration, persistence |
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| (noun) persistent determination | Synonyms: doggedness, persistence, persistency, pertinacity, tenaciousness, tenacity |
| perseveration | (noun) the act of persisting or persevering; continuing or repeating behavior | Synonyms: perseverance, persistence |
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| (noun) the tendency for a memory or idea to persist or recur without any apparent stimulus for it | - |
| persicot | (noun) a cordial made of the kernels of apricots, nectarines, etc., with refined spirit. | - |
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| persiflage | (noun) light teasing | - |
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| persimmon | (noun) orange fruit resembling a plum; edible when fully ripe | - |
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| (noun) any of several tropical trees of the genus Diospyros | Synonyms: persimmon tree |
| persistence | (noun) the act of persisting or persevering; continuing or repeating behavior | Synonyms: perseverance, perseveration |
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| (noun) persistent determination | Synonyms: doggedness, perseverance, persistency, pertinacity, tenaciousness, tenacity |
| (noun) the property of a continuous and connected period of time | Synonyms: continuity |
| persistency | (noun) persistent determination | Synonyms: doggedness, perseverance, persistence, pertinacity, tenaciousness, tenacity |
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| person | (noun) a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential | Synonyms: individual, mortal, somebody, someone, soul |
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| (noun) a human body (usually including the clothing) | - |
| (noun) a grammatical category used in the classification of pronouns, possessive determiners, and verb forms according to whether they indicate the speaker, the addressee, or a third party | - |
| persona | (noun) (Jungian psychology) a personal facade that one presents to the world | Synonyms: image |
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| (noun) an actor's portrayal of someone in a play | Synonyms: character, part, role, theatrical role |
| personableness | (noun) the complex of attributes that make a person socially attractive | - |
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| personage | (noun) another word for person; a person not meriting identification | - |
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| (noun) a person whose actions and opinions strongly influence the course of events | Synonyms: important person, influential person |
| personal | (noun) a short newspaper article about a particular person or group | - |
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| personality | (noun) the complex of all the attributes--behavioral, temperamental, emotional and mental--that characterize a unique individual | - |
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| (noun) a person of considerable prominence | - |
| personalty | (noun) movable property (as distinguished from real estate) | Synonyms: personal estate, personal property, private property |
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| personation | (noun) imitating the mannerisms of another person | Synonyms: impersonation |
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| (noun) acting the part of a character on stage; dramatically representing the character by speech and action and gesture | Synonyms: characterization, enactment, portrayal |
| personhood | (noun) being a person | - |
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| personification | (noun) the act of attributing human characteristics to abstract ideas etc. | Synonyms: incarnation |
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| (noun) representing an abstract quality or idea as a person or creature | Synonyms: prosopopoeia |
| (noun) a person who represents an abstract quality | - |
| personnel | (noun) group of people willing to obey orders | Synonyms: force |
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| (noun) the department responsible for hiring and training and placing employees and for setting policies for personnel management | Synonyms: personnel department, personnel office, staff office |
| perspective | (noun) the appearance of things relative to one another as determined by their distance from the viewer | Synonyms: linear perspective |
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| (noun) a way of regarding situations or topics etc. | Synonyms: position, view |
| perspicaciousness | (noun) intelligence manifested by being astute (as in business dealings) | Synonyms: astuteness, perspicacity, shrewdness |
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| perspicacity | (noun) the capacity to assess situations or circumstances shrewdly and to draw sound conclusions | Synonyms: judgement, judgment, sound judgement, sound judgment |
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| (noun) intelligence manifested by being astute (as in business dealings) | Synonyms: astuteness, perspicaciousness, shrewdness |
| perspicuity | (noun) clarity as a consequence of being perspicuous | Synonyms: perspicuousness, plainness |
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| perspicuousness | (noun) clarity as a consequence of being perspicuous | Synonyms: perspicuity, plainness |
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| perspiration | (noun) salty fluid secreted by sweat glands | Synonyms: sudor, sweat |
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| (noun) the process of the sweat glands of the skin secreting a salty fluid | Synonyms: diaphoresis, hidrosis, sudation, sweating |
| perspirer | (noun) a person who perspires | Synonyms: sweater |
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| persuader | (noun) someone who tries to persuade or induce or lead on | Synonyms: inducer |
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| persuasion | (noun) a personal belief or judgment that is not founded on proof or certainty | Synonyms: opinion, sentiment, thought, view |
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| (noun) the act of persuading (or attempting to persuade); communication intended to induce belief or action | Synonyms: suasion |
| persuasiveness | (noun) the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty | Synonyms: strength |
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| pertainym | (noun) meaning relating to or pertaining to | - |
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| pertinacity | (noun) persistent determination | Synonyms: doggedness, perseverance, persistence, persistency, tenaciousness, tenacity |
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| pertinence | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: applicability, pertinency |
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| pertinency | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: applicability, pertinence |
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| pertness | (noun) inappropriate playfulness | Synonyms: archness, impertinence, perkiness, sauciness |
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| (noun) quality of being lively and confident | - |
| perturbation | (noun) the act of causing disorder | Synonyms: disruption |
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| (noun) a disposition that is confused or nervous and upset | Synonyms: fluster |
| (noun) activity that is a malfunction, intrusion, or interruption | Synonyms: disturbance |
| (noun) (physics) a secondary influence on a system that causes it to deviate slightly | - |
| (noun) an unhappy and worried mental state | Synonyms: disturbance, upset |
| pertussis | (noun) a disease of the respiratory mucous membrane | Synonyms: whooping cough |
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| peruke | (noun) a wig for men that was fashionable in the 17th and 18th centuries | Synonyms: periwig |
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| perusal | (noun) reading carefully with intent to remember | Synonyms: perusing, poring over, studying |
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| perusing | (noun) reading carefully with intent to remember | Synonyms: perusal, poring over, studying |
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| perv | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perve, pervert |
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| pervaporation | (noun) the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off | - |
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| pervasion | (noun) the process of permeating or infusing something with a substance | Synonyms: permeation, suffusion |
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| pervasiveness | (noun) the quality of filling or spreading throughout | - |
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| perve | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perv, pervert |
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| perverseness | (noun) deliberate and stubborn unruliness and resistance to guidance or discipline | Synonyms: contrariness, perversity |
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| (noun) deliberately deviating from what is good | Synonyms: perversity |
| perversion | (noun) the action of perverting something (turning it to a wrong use) | - |
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| (noun) an aberrant sexual practice | Synonyms: sexual perversion |
| (noun) a curve that reverses the direction of something | - |
| perversity | (noun) deliberately deviating from what is good | Synonyms: perverseness |
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| (noun) deliberate and stubborn unruliness and resistance to guidance or discipline | Synonyms: contrariness, perverseness |
| pervert | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perv, perve |
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| perviousness | (noun) the quality of being penetrable (by people or light or missiles etc.) | Synonyms: penetrability |
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| pes | (noun) the part of the leg of a human being below the ankle joint | Synonyms: foot, human foot |
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| pesantran | (noun) a Muslim school in Indonesia operated by religious leaders | Synonyms: pesantren |
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| pesantren | (noun) a Muslim school in Indonesia operated by religious leaders | Synonyms: pesantran |
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| peseta | (noun) formerly the basic unit of money in Spain; equal to 100 centimos | Synonyms: Spanish peseta |
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