| pascal | (noun) a unit of pressure equal to one newton per square meter | Synonyms: Pa |
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| pastoral | (noun) a musical composition that evokes rural life | Synonyms: idyl, idyll, pastorale |
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| (noun) a literary work idealizing the rural life (especially the life of shepherds) | - |
| (noun) a letter from a pastor to the congregation | - |
| patrial | (noun) a person who has the right to be considered legally a British citizen (by virtue of the birth of a parent or grandparent) | - |
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| peal | (noun) a deep prolonged sound (as of thunder or large bells) | Synonyms: pealing, roll, rolling |
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| pectoral | (noun) an adornment worn on the chest or breast | Synonyms: pectoral medallion |
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| (noun) either of two large muscles of the chest | Synonyms: musculus pectoralis, pecs, pectoral muscle, pectoralis |
| pedal | (noun) a lever that is operated with the foot | Synonyms: foot lever, foot pedal, treadle |
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| (noun) a sustained bass note | Synonyms: pedal point |
| pedestal | (noun) a support or foundation | Synonyms: base, stand |
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| (noun) an architectural support or base (as for a column or statue) | Synonyms: footstall, plinth |
| (noun) a position of great esteem (and supposed superiority) | - |
| 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 |
| pentobarbital | (noun) a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic | Synonyms: Nembutal, pentobarbital sodium, yellow jacket |
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| perennial | (noun) (botany) a plant lasting for three seasons or more | - |
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| periodical | (noun) a publication that appears at fixed intervals | - |
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| peripheral | (noun) electronic equipment external to the circuit board that contains the CPU of a computer | Synonyms: computer peripheral, peripheral device |
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| personal | (noun) a short newspaper article about a particular person or group | - |
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| perusal | (noun) reading carefully with intent to remember | Synonyms: perusing, poring over, studying |
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| petal | (noun) part of the perianth that is usually brightly colored | Synonyms: flower petal |
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| petrochemical | (noun) any compound obtained from petroleum or natural gas | - |
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| pharmaceutical | (noun) drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment | Synonyms: pharmaceutic |
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| pharyngeal | (noun) a consonant articulated in the back of the mouth or throat | Synonyms: guttural, guttural consonant, pharyngeal consonant |
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| phenobarbital | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbitone, purple heart, sodium thiopental |
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| phial | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampoule, ampul, ampule, vial |
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| phytochemical | (noun) a chemical substance obtained from plants that is biologically active but not nutritive | - |
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| pictorial | (noun) a periodical (magazine or newspaper) containing many pictures | - |
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| pipal | (noun) fig tree of India noted for great size and longevity; lacks the prop roots of the banyan; regarded as sacred by Buddhists | Synonyms: bo tree, Ficus religiosa, peepul, pipal tree, pipul, sacred fig |
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| placental | (noun) mammals having a placenta; all mammals except monotremes and marsupials | Synonyms: eutherian, eutherian mammal, placental mammal |
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| planetesimal | (noun) one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system | - |
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| plural | (noun) the form of a word that is used to denote more than one | Synonyms: plural form |
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| polynomial | (noun) a mathematical function that is the sum of a number of terms | Synonyms: multinomial |
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| pontifical | (noun) the vestments and other insignia of a pontiff (especially a bishop) | - |
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| portal | (noun) a grand and imposing entrance (often extended metaphorically) | - |
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| (noun) a short vein that carries blood into the liver | Synonyms: hepatic portal vein, portal vein, vena portae |
| (noun) a site that the owner positions as an entrance to other sites on the internet | Synonyms: portal site |
| portrayal | (noun) representation by drawing or painting etc | Synonyms: delineation, depiction |
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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, personation |
| (noun) any likeness of a person, in any medium | Synonyms: portrait |
| (noun) a representation by picture or portraiture | Synonyms: depicting, depiction, portraying |
| (noun) a word picture of a person's appearance and character | Synonyms: portrait, portraiture |
| postdoctoral | (noun) a grant that funds postdoctoral study or research | Synonyms: post doc, postdoc |
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| potential | (noun) the difference in electrical charge between two points in a circuit expressed in volts | Synonyms: electric potential, potential difference, potential drop, voltage |
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| (noun) the inherent capacity for coming into being | Synonyms: potency, potentiality |
| poundal | (noun) a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound; equal to 0.1382 newtons | Synonyms: pdl |
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| pretrial | (noun) (law) a conference held before the trial begins to bring the parties together to outline discovery proceedings and to define the issues to be tried; more useful in civil than in criminal cases | Synonyms: pretrial conference |
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| principal | (noun) the educator who has executive authority for a school | Synonyms: head, head teacher, school principal |
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| (noun) an actor who plays a principal role | Synonyms: lead, star |
| (noun) the major party to a financial transaction at a stock exchange; buys and sells for his own account | Synonyms: dealer |
| (noun) (criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement | - |
| (noun) the original amount of a debt on which interest is calculated | - |
| (noun) capital as contrasted with the income derived from it | Synonyms: corpus, principal sum |
| processional | (noun) religious music used in a procession | Synonyms: prosodion |
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| procural | (noun) the act of getting possession of something | Synonyms: procurance, procurement |
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| prodigal | (noun) a recklessly extravagant consumer | Synonyms: profligate, squanderer |
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| professional | (noun) a person engaged in one of the learned professions | Synonyms: professional person |
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| (noun) an authority qualified to teach apprentices | Synonyms: master |
| (noun) an athlete who plays for pay | Synonyms: pro |
| promposal | (noun) The act of asking someone to go to a prom with you | - |
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| pronominal | (noun) a phrase that functions as a pronoun | Synonyms: pronominal phrase |
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| propanal | (noun) a colorless liquid aldehyde | Synonyms: propionaldehyde |
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| propenal | (noun) a pungent colorless unsaturated liquid aldehyde made from propene | Synonyms: acrolein |
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| proportional | (noun) one of the quantities in a mathematical proportion | - |
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| proposal | (noun) something proposed (such as a plan or assumption) | - |
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| (noun) the act of making a proposal | Synonyms: proposition |
| (noun) an offer of marriage | Synonyms: marriage offer, marriage proposal, proposal of marriage |
| protomammal | (noun) probably warm-blooded; considered direct ancestor of mammals | Synonyms: therapsid |
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| provincial | (noun) a country person | Synonyms: bucolic, peasant |
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| (noun) (Roman Catholic Church) an official in charge of an ecclesiastical province acting under the superior general of a religious order | - |
| pursual | (noun) the act of pursuing in an effort to overtake or capture | Synonyms: chase, following, pursuit |
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| pyridoxal | (noun) a B vitamin that is essential for metabolism of amino acids and starch | Synonyms: adermin, pyridoxamine, pyridoxine, vitamin B6 |
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| quadrilateral | (noun) a four-sided polygon | Synonyms: quadrangle, tetragon |
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| quarterfinal | (noun) one of the four competitions in an elimination tournament whose winners go on to play in the semifinals | - |
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| quatercentennial | (noun) the 400th anniversary (or the celebration of it) | Synonyms: quatercentenary |
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| quetzal | (noun) large trogon of Central America and South America having golden-green and scarlet plumage | Synonyms: quetzal bird |
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| (noun) the basic unit of money in Guatemala; equal to 100 centavos | - |
| quincentennial | (noun) the 500th anniversary (or the celebration of it) | Synonyms: quincentenary |
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| quintal | (noun) a United States unit of weight equivalent to 100 pounds | Synonyms: cental, centner, cwt, hundredweight, short hundredweight |
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| (noun) a unit of weight equal to 100 kilograms | - |
| radial | (noun) pneumatic tire that has radial-ply casing | Synonyms: radial-ply tire, radial tire |
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| radical | (noun) a character conveying the lexical meaning of a logogram | - |
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| (noun) (linguistics) the form of a word after all affixes are removed | Synonyms: base, root, root word, stem, theme |
| (noun) a person who has radical ideas or opinions | - |
| (noun) (mathematics) a quantity expressed as the root of another quantity | - |
| (noun) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule | Synonyms: chemical group, group |
| (noun) an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule | Synonyms: free radical |
| radiopharmaceutical | (noun) pharmaceutical consisting of a radioactive compound used in radiation therapy | - |
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| rascal | (noun) one who is playfully mischievous | Synonyms: imp, monkey, rapscallion, scalawag, scallywag, scamp |
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| (noun) a deceitful and unreliable scoundrel | Synonyms: knave, rapscallion, rogue, scalawag, scallywag, varlet |
| rational | (noun) an integer or a fraction | Synonyms: rational number |
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| real | (noun) any rational or irrational number | Synonyms: real number |
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| (noun) an old small silver Spanish coin | - |
| (noun) the basic unit of money in Brazil; equal to 100 centavos | - |
| reappraisal | (noun) a new appraisal or evaluation | Synonyms: reassessment, revaluation, review |
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| reburial | (noun) the act of burying again | Synonyms: reburying |
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| rebuttal | (noun) the speech act of refuting by offering a contrary contention or argument | - |
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| (noun) (law) a pleading by the defendant in reply to a plaintiff's surrejoinder | Synonyms: rebutter |
| recessional | (noun) a hymn that is sung at the end of a service as the clergy and choir withdraw | - |
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| (noun) the withdrawal of the clergy and choir from the chancel to the vestry at the end of a church service | Synonyms: recession |
| reciprocal | (noun) hybridization involving a pair of crosses that reverse the sexes associated with each genotype | Synonyms: reciprocal cross |
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| (noun) (mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the multiplicative inverse of 7 is 1/7 | Synonyms: multiplicative inverse |
| (noun) something (a term or expression or concept) that has an inverse relation to something else | - |
| recital | (noun) the act of giving an account describing incidents or a course of events | Synonyms: narration, yarn |
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| (noun) a public instance of reciting or repeating (from memory) something prepared in advance | Synonyms: reading, recitation |
| (noun) performance of music or dance especially by soloists | - |
| (noun) a detailed account or description of something | - |
| recusal | (noun) (law) the disqualification of a judge or jury by reason of prejudice or conflict of interest; a judge can be recused by objections of either party or judges can disqualify themselves | Synonyms: recusation |
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| referral | (noun) the act of referring (as forwarding an applicant for employment or referring a matter to an appropriate agency) | - |
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| (noun) a recommendation to consult the (professional) person or group to whom one has been referred | - |
| (noun) a person whose case has been referred to a specialist or professional group | - |
| refusal | (noun) a message refusing to accept something that is offered | - |
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| (noun) the act of refusing | - |
| refutal | (noun) the act of determining that something is false | Synonyms: disproof, falsification, falsifying, refutation |
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| rehearsal | (noun) (psychology) a form of practice; repetition of information (silently or aloud) in order to keep it in short-term memory | - |
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| (noun) a practice session in preparation for a public performance (as of a play or speech or concert) | Synonyms: dry run |
| remittal | (noun) the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance | Synonyms: absolution, remission, remission of sin |
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| (noun) an abatement in intensity or degree (as in the manifestations of a disease) | Synonyms: remission, subsidence |
| (noun) a payment of money sent to a person in another place | Synonyms: remission, remitment, remittance |
| removal | (noun) the act of removing | Synonyms: remotion |
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| (noun) dismissal from office | - |
| renewal | (noun) the conversion of wasteland into land suitable for use of habitation or cultivation | Synonyms: reclamation, rehabilitation |
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| (noun) the act of renewing | - |
| (noun) filling again by supplying what has been used up | Synonyms: refilling, replacement, replenishment |
| rental | (noun) the act of paying for the use of something (as an apartment or house or car) | Synonyms: renting |
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| (noun) property that is leased or rented out or let | Synonyms: lease, letting |
| repeal | (noun) the act of abrogating; an official or legal cancellation | Synonyms: abrogation, annulment |
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| reprisal | (noun) a retaliatory action against an enemy in wartime | - |
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| reproval | (noun) an act or expression of criticism and censure | Synonyms: rebuke, reprehension, reprimand, reproof |
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| requital | (noun) an act of requiting; returning in kind | Synonyms: payment |
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| (noun) a justly deserved penalty | Synonyms: retribution |
| residual | (noun) (often plural) a payment that is made to a performer or writer or director of a television show or commercial that is paid for every repeat showing | - |
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| (noun) something left after other parts have been taken away | Synonyms: balance, remainder, residue, residuum, rest |
| retinal | (noun) either of two yellow to red retinal pigments formed from rhodopsin by the action of light | Synonyms: retinene |
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| retrial | (noun) a new trial in which issues already litigated and to which the court has already rendered a verdict or decision are reexamined by the same court; occurs when the initial trial is found to have been improper or unfair due to procedural errors | - |
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| retrieval | (noun) the act of regaining or saving something lost (or in danger of becoming lost) | Synonyms: recovery |
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| (noun) the cognitive operation of accessing information in memory | - |
| (noun) (computer science) the operation of accessing information from the computer's memory | - |
| reversal | (noun) a change from one state to the opposite state | - |
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| (noun) the act of reversing the order or place of | Synonyms: transposition |
| (noun) turning in the opposite direction | Synonyms: reverse, reversion, turnabout, turnaround |
| (noun) a major change in attitude or principle or point of view | Synonyms: about-face, policy change, volte-face |
| (noun) a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside | - |
| (noun) a decision to reverse an earlier decision | Synonyms: change of mind, flip-flop, turnabout, turnaround |
| (noun) turning in an opposite direction or position | Synonyms: turn around |
| (noun) an unfortunate happening that hinders or impedes; something that is thwarting or frustrating | Synonyms: black eye, blow, reverse, setback |
| revisal | (noun) the act of rewriting something | Synonyms: rescript, revise, revision |
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| revival | (noun) bringing again into activity and prominence | Synonyms: resurgence, revitalisation, revitalization, revivification |
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| (noun) an evangelistic meeting intended to reawaken interest in religion | Synonyms: revival meeting |
| rial | (noun) the basic unit of money in Yemen; equal to 100 fils | Synonyms: Yemeni rial |
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| (noun) the basic unit of money in Iran | Synonyms: Iranian rial |
| (noun) the basic unit of money in Oman | Synonyms: Omani rial, riyal-omani |
| ritual | (noun) any customary observance or practice | Synonyms: rite |
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| (noun) the prescribed procedure for conducting religious ceremonies | - |
| (noun) stereotyped behavior | - |
| rival | (noun) the contestant you hope to defeat | Synonyms: challenger, competition, competitor, contender |
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| riyal | (noun) the basic unit of money in Qatar | Synonyms: Qatari riyal |
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| (noun) the basic unit of money in Saudi Arabia | Synonyms: Saudi Arabian riyal |
| rorqual | (noun) any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin | Synonyms: razorback |
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| royal | (noun) stag with antlers of 12 or more branches | Synonyms: royal stag |
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| (noun) a sail set next above the topgallant on a royal mast | - |
| sabbatical | (noun) a leave usually taken every seventh year | Synonyms: sabbatical leave |
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| salal | (noun) small evergreen shrub of Pacific coast of North America having edible dark purple grape-sized berries | Synonyms: Gaultheria shallon, shallon |
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| sandal | (noun) a shoe consisting of a sole fastened by straps to the foot | - |
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| scandal | (noun) disgraceful gossip about the private lives of other people | Synonyms: dirt, malicious gossip |
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| (noun) a disgraceful event | Synonyms: outrage |
| seal | (noun) any of numerous marine mammals that come on shore to breed; chiefly of cold regions | - |
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| (noun) a device incised to make an impression; used to secure a closing or to authenticate documents | Synonyms: stamp |
| (noun) fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters | Synonyms: sealing wax |
| (noun) fastener that provides a tight and perfect closure | - |
| (noun) a finishing coat applied to exclude moisture | - |
| (noun) an indication of approved or superior status | Synonyms: cachet, seal of approval |
| (noun) a stamp affixed to a document (as to attest to its authenticity or to seal it) | - |
| (noun) the pelt or fur (especially the underfur) of a seal | Synonyms: sealskin |
| seasonal | (noun) a worker who finds employment only in certain seasons | Synonyms: seasonal worker |
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| secobarbital | (noun) barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions | Synonyms: red devil, secobarbital sodium, Seconal |
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