| posterity | (noun) all future generations | - |
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| (noun) all of the offspring of a given progenitor | Synonyms: descendants |
| potentiality | (noun) an aptitude that may be developed | Synonyms: capability, capableness |
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| (noun) the inherent capacity for coming into being | Synonyms: potency, potential |
| practicability | (noun) the quality of being usable | Synonyms: practicableness |
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| practicality | (noun) concerned with actual use rather than theoretical possibilities | - |
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| preciosity | (noun) the quality of being fastidious or excessively refined | Synonyms: preciousness |
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| precocity | (noun) intelligence achieved far ahead of normal developmental schedules | Synonyms: precociousness |
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| predictability | (noun) the quality of being predictable | - |
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| prematurity | (noun) the state of being premature | Synonyms: prematureness |
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| primality | (noun) the property of being a prime number | - |
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| primordiality | (noun) The quality of being first, earliest or original. | - |
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| principality | (noun) territory ruled by a prince | Synonyms: princedom |
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| priority | (noun) preceding in time | Synonyms: antecedence, antecedency, anteriority, precedence, precedency |
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| (noun) status established in order of importance or urgency | Synonyms: precedence, precedency |
| probability | (noun) the quality of being probable; a probable event or the most probable event | - |
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| (noun) a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible | Synonyms: chance |
| probity | (noun) complete and confirmed integrity; having strong moral principles | - |
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| proclivity | (noun) a natural inclination | Synonyms: leaning, propensity |
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| prodigality | (noun) the activity of excessive spending | Synonyms: extravagance, high life, highlife, lavishness |
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| (noun) the trait of spending extravagantly | Synonyms: extravagance, profligacy |
| productivity | (noun) the quality of being productive or having the power to produce | Synonyms: productiveness |
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| (noun) (economics) the ratio of the quantity and quality of units produced to the labor per unit of time | - |
| profanity | (noun) vulgar or irreverent speech or action | - |
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| profitability | (noun) the quality of affording gain or benefit or profit | Synonyms: gainfulness, lucrativeness, profitableness |
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| profundity | (noun) the quality of being physically deep | Synonyms: deepness, profoundness |
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| (noun) intellectual depth, penetrating knowledge, keen insight, etc; "the depth of my feeling"; "the profoundness of the silence" | Synonyms: profoundness |
| (noun) the intellectual ability to penetrate deeply into ideas | Synonyms: astuteness, deepness, depth, profoundness |
| (noun) wisdom that is recondite and abstruse and profound | Synonyms: abstruseness, abstrusity, profoundness, reconditeness |
| programmability | (noun) the abstract capability of being programmable. | - |
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| progressivity | (noun) advancement toward better conditions or policies or methods | Synonyms: progressiveness |
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| prolixity | (noun) boring verbosity | Synonyms: long-windedness, prolixness, windiness, wordiness |
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| promiscuity | (noun) indulging in promiscuous (casual and indiscriminate) sexual relations | Synonyms: promiscuousness, sleeping around |
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| propensity | (noun) a disposition to behave in a certain way | Synonyms: aptness |
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| (noun) a natural inclination | Synonyms: leaning, proclivity |
| (noun) an inclination to do something | Synonyms: leaning, tendency |
| propinquity | (noun) the property of being close together | Synonyms: proximity |
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| proportionality | (noun) harmonious arrangement or relation of parts or elements within a whole (as in a design) | Synonyms: balance, proportion |
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| (noun) a ratio of two quantities that is constant | - |
| prosociality | (noun) The quality of being beneficial to all parties and consistent with community laws and mores. | - |
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| prosperity | (noun) the condition of prospering; having good fortune | Synonyms: successfulness |
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| (noun) an economic state of growth with rising profits and full employment | - |
| provability | (noun) capability of being demonstrated or logically proved | Synonyms: demonstrability |
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| proximity | (noun) the property of being close together | Synonyms: propinquity |
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| (noun) a Gestalt principle of organization holding that (other things being equal) objects or events that are near to one another (in space or time) are perceived as belonging together as a unit | Synonyms: law of proximity |
| (noun) the region close around a person or thing | - |
| psychosexuality | (noun) the mental representation of sexual activities | - |
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| publicity | (noun) the quality of being open to public view | - |
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| (noun) a message issued in behalf of some product or cause or idea or person or institution | Synonyms: packaging, promo, promotion, promotional material |
| puerility | (noun) a property characteristic of a child | Synonyms: childishness |
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| (noun) the state of a child between infancy and adolescence | Synonyms: childhood |
| pugnacity | (noun) a natural disposition to be hostile | Synonyms: aggressiveness, belligerence |
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| punctuality | (noun) the quality or habit of adhering to an appointed time | Synonyms: promptness |
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| purity | (noun) a woman's virtue or chastity | Synonyms: honor, honour, pureness |
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| (noun) being undiluted or unmixed with extraneous material | Synonyms: pureness |
| (noun) the state of being unsullied by sin or moral wrong; lacking a knowledge of evil | Synonyms: innocence, pureness, sinlessness, whiteness |
| pusillanimity | (noun) contemptible fearfulness | Synonyms: pusillanimousness |
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| putridity | (noun) the state of being putrid | - |
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| pyroelectricity | (noun) generation of an electric charge on certain crystals (such as tourmaline) as a result of a change in temperature | - |
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| quality | (adjective) of superior grade | Synonyms: choice, prime, prize, select |
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| (adjective) of high social status | - |
| (noun) an essential and distinguishing attribute of something or someone | - |
| (noun) (music) the distinctive property of a complex sound (a voice or noise or musical sound) | Synonyms: timber, timbre, tone |
| (noun) a degree or grade of excellence or worth | Synonyms: caliber, calibre |
| (noun) a characteristic property that defines the apparent individual nature of something | Synonyms: character, lineament |
| (noun) high social status | - |
| quantifiability | (noun) the quality of being measurable | Synonyms: measurability |
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| quantity | (noun) how much there is or how many there are of something that you can quantify | Synonyms: amount, measure |
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| (noun) an adequate or large amount | - |
| (noun) the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable | - |
| quaternity | (noun) the cardinal number that is the sum of three and one | Synonyms: 4, four, foursome, IV, Little Joe, quadruplet, quartet, quatern, quaternary, quaternion, tetrad |
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| quiddity | (noun) the essence that makes something the kind of thing it is and makes it different from any other | Synonyms: haecceity |
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| (noun) an evasion of the point of an argument by raising irrelevant distinctions or objections | Synonyms: cavil, quibble |
| quotability | (noun) the quality of being worthy of being quoted | - |
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| rabidity | (noun) unrestrained excitement or enthusiasm | Synonyms: madness, rabidness |
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| (noun) The property of being very extreme, unreasonable, or fanatical in opinion; excessively zealous; comparable to one with rabies. | - |
| radioactivity | (noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay | Synonyms: radiation |
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| radiopacity | (noun) opacity to X-rays or other radiation | Synonyms: radio-opacity |
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| radiosensitivity | (noun) sensitivity to the action of radiant energy | Synonyms: photosensitivity |
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| rancidity | (noun) the state of being rancid; having a rancid scent or flavor (as of old cooking oil) | - |
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| rapacity | (noun) reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins) | Synonyms: avarice, avaritia, covetousness, greed |
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| (noun) extreme gluttony | Synonyms: edacity, esurience, rapaciousness, voraciousness, voracity |
| (noun) (of an animal, usually a bird) The quality of subsisting off live prey. | Synonyms: predaceousness, predaciousness, rapaciousness |
| rapidity | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidness, speediness |
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| rarity | (noun) something unusual -- perhaps worthy of collecting | Synonyms: curio, curiosity, oddity, oddment, peculiarity |
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| (noun) a rarified quality | Synonyms: low density, tenuity |
| (noun) noteworthy scarcity | Synonyms: infrequency, rareness |
| rascality | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilment, devilry, deviltry, mischief-making, mischief, mischievousness, roguery, roguishness, shenanigan |
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| (noun) the trait of indulging in disreputable pranks | Synonyms: prankishness, roguishness |
| (noun) the quality of being a slippery rascal | Synonyms: shiftiness, slipperiness, trickiness |
| ratability | (noun) the quality of being capable of being rated or estimated | - |
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| (noun) the state of being liable to assessment or taxation | Synonyms: rateability |
| rateability | (noun) the state of being liable to assessment or taxation | Synonyms: ratability |
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| rationality | (noun) the quality of being consistent with or based on logic | Synonyms: rationalness |
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| (noun) the state of having good sense and sound judgment | Synonyms: reason, reasonableness |
| reactivity | (noun) responsive to stimulation | Synonyms: responsiveness |
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| (noun) ready susceptibility to chemical change | - |
| readability | (noun) the quality of written language that makes it easy to read and understand | - |
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| (noun) a quality of writing (print or handwriting) that can be easily read | Synonyms: legibility |
| reality | (noun) the quality possessed by something that is real | - |
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| (noun) all of your experiences that determine how things appear to you | Synonyms: world |
| (noun) the state of being actual or real | Synonyms: realism, realness |
| (noun) the state of the world as it really is rather than as you might want it to be | - |
| receptivity | (noun) willingness or readiness to receive (especially impressions or ideas) | Synonyms: openness, receptiveness |
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| reciprocality | (noun) a relation of mutual dependence or action or influence | Synonyms: reciprocity |
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| reciprocity | (noun) mutual exchange of commercial or other privileges | - |
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| (noun) a relation of mutual dependence or action or influence | Synonyms: reciprocality |
| rectangularity | (noun) the property of being shaped like a rectangle | Synonyms: oblongness |
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| rectilinearity | (noun) the property possessed by a line or surface that is rectilinear, straight. | - |
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| reflectivity | (noun) the ability to reflect beams or rays | Synonyms: reflection, reflexion |
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| (noun) the capability of quiet thought or contemplation | Synonyms: reflectiveness |
| (noun) the fraction of radiant energy that is reflected from a surface | Synonyms: coefficient of reflection, reflectance, reflection factor |
| reflexivity | (noun) the coreferential relation between a reflexive pronoun and its antecedent | Synonyms: reflexiveness |
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| (noun) (logic and mathematics) a relation such that it holds between an element and itself | Synonyms: reflexiveness |
| refractivity | (noun) the physical property of a medium as determined by its index of refraction | Synonyms: refractiveness |
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| regionality | (noun) The property of being of, or pertaining to, a specific region or district. | - |
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| (noun) The property of being of, or pertaining to, a large geographic region. | - |
| regularity | (noun) the quality of being characterized by a fixed principle or rate | - |
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| (noun) a property of polygons: the property of having equal sides and equal angles | Synonyms: geometrical regularity |
| relativity | (noun) the quality of being relative and having significance only in relation to something else | - |
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| (noun) (physics) the theory that space and time are relative concepts rather than absolute concepts | Synonyms: Einstein's theory of relativity, relativity theory, theory of relativity |
| reliability | (noun) the quality of being dependable or reliable | Synonyms: dependability, dependableness, reliableness |
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| religiosity | (noun) exaggerated or affected piety and religious zeal | Synonyms: pietism, religionism, religiousism |
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| reluctivity | (noun) (physics) the resistance of a material to the establishment of a magnetic field in it | - |
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| removability | (noun) The state of being able to be dismissed from office. | - |
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| replaceability | (noun) exchangeability by virtue of being replaceable | Synonyms: commutability, substitutability |
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| reprehensibility | (noun) being reprehensible; worthy of and deserving reprehension or reproof | - |
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| reproducibility | (noun) the quality of being reproducible | Synonyms: duplicability |
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| reputability | (noun) honorableness by virtue of being respectable and having a good reputation | Synonyms: respectability |
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| resistivity | (noun) a material's opposition to the flow of electric current; measured in ohms | Synonyms: electric resistance, electrical resistance, impedance, ohmic resistance, resistance |
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| respectability | (noun) honorableness by virtue of being respectable and having a good reputation | Synonyms: reputability |
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| responsibility | (noun) the social force that binds you to the courses of action demanded by that force | Synonyms: duty, obligation |
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| (noun) a form of trustworthiness; the trait of being answerable to someone for something or being responsible for one's conduct | Synonyms: responsibleness |
| (noun) the proper sphere or extent of your activities | Synonyms: province |
| retentivity | (noun) the power of retaining liquid | Synonyms: retention, retentiveness |
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| (noun) the property of retaining possessions that have been acquired | Synonyms: retentiveness |
| (noun) the power of retaining and recalling past experience | Synonyms: memory, retention, retentiveness |
| reversibility | (noun) the quality of being reversible in either direction | - |
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| rhythmicity | (noun) the rhythmic property imparted by the accents and relative durations of notes in a piece of music | - |
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| rigidity | (noun) the physical property of being stiff and resisting bending | Synonyms: rigidness |
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| (noun) the quality of being rigid and rigorously severe | Synonyms: inflexibility, rigidness |
| risibility | (noun) a disposition to laugh | - |
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| rotundity | (noun) the roundness of a 3-dimensional object | Synonyms: globosity, globularness, rotundness, sphericalness, sphericity |
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| (noun) the fullness of a tone of voice | Synonyms: roundness |
| rurality | (noun) a rural characteristic or trait | Synonyms: ruralism |
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| rusticity | (noun) the quality of being rustic or gauche | Synonyms: gaucherie |
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| saccharinity | (noun) the excessive sweetness of saccharin | - |
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| sagacity | (noun) the trait of forming opinions by distinguishing and evaluating | Synonyms: judiciousness, sagaciousness |
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| (noun) the mental ability to understand and discriminate between relations | Synonyms: discernment, judgement, judgment, sagaciousness |
| salability | (noun) the quality of being salable or marketable | Synonyms: salableness |
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| salacity | (noun) the trait of behaving in an obscene manner | Synonyms: bawdiness, lewdness, obscenity, salaciousness |
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| salinity | (noun) the relative proportion of salt in a solution | Synonyms: brininess |
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| (noun) the taste experience when common salt is taken into the mouth | Synonyms: salt, saltiness |
| salubrity | (noun) the quality of being salubrious and invigorating | Synonyms: salubriousness |
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| sanctity | (noun) the quality of being holy | Synonyms: holiness, sanctitude |
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| sanguinity | (noun) feeling sanguine; optimistically cheerful and confident | Synonyms: sanguineness |
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| sanity | (noun) normal or sound powers of mind | Synonyms: saneness |
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