| randomisation | (noun) a deliberately haphazard arrangement of observations so as to simulate chance | Synonyms: randomization |
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| randomization | (noun) a deliberately haphazard arrangement of observations so as to simulate chance | Synonyms: randomisation |
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| randomness | (noun) the quality of lacking any predictable order or plan | Synonyms: haphazardness, noise, stochasticity |
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| (noun) (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work | Synonyms: entropy, S |
| ranee | (noun) (the feminine of raja) a Hindu princess or the wife of a raja | Synonyms: rani |
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| range | (noun) a place for shooting (firing or driving) projectiles of various kinds | - |
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| (noun) a kitchen appliance used for cooking food | Synonyms: cooking stove, kitchen range, kitchen stove, stove |
| (noun) an area in which something acts or operates or has power or control: | Synonyms: ambit, compass, orbit, reach, scope |
| (noun) the limit of capability | Synonyms: compass, grasp, reach |
| (noun) a variety of different things or activities | - |
| (noun) (mathematics) the set of values of the dependent variable for which a function is defined | Synonyms: image, range of a function |
| (noun) the limits within which something can be effective | Synonyms: reach |
| (noun) a large tract of grassy open land on which livestock can graze | - |
| (noun) a series of hills or mountains | Synonyms: chain, chain of mountains, mountain chain, mountain range, range of mountains |
| rangefinder | (noun) a measuring instrument (acoustic or optical or electronic) for finding the distance of an object | Synonyms: range finder |
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| rangeland | (noun) land suitable for grazing livestock | - |
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| ranger | (noun) an official who is responsible for managing and protecting an area of forest | Synonyms: fire warden, forest fire fighter |
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| (noun) a member of a military unit trained as shock troops for hit-and-run raids | Synonyms: commando |
| ranginess | (noun) The state of being slender and long of limb, lanky. | - |
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| rangpur | (noun) hybrid between mandarin orange and lemon having very acid fruit with orange peel | Synonyms: Citrus limonia, lemanderin, rangpur lime |
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| rani | (noun) (the feminine of raja) a Hindu princess or the wife of a raja | Synonyms: ranee |
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| ranid | (noun) insectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs | Synonyms: true frog |
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| ranitidine | (noun) a histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux | Synonyms: Zantac |
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| rank | (noun) a row or line of people (especially soldiers or police) standing abreast of one another | - |
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| (noun) the ordinary members of an organization (such as the enlisted soldiers of an army) | Synonyms: rank and file |
| (noun) the body of members of an organization or group | Synonyms: membership |
| (noun) relative status | - |
| (noun) position in a social hierarchy | Synonyms: social rank, social station, social status |
| ranker | (noun) an enlisted soldier who serves in the ranks of the armed forces | - |
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| (noun) a commissioned officer who has been promoted from enlisted status | - |
| ranking | (noun) position on a scale in relation to others in status or rank or achievement | - |
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| rankness | (noun) the attribute of having a strong offensive smell | Synonyms: fetidness, foulness, malodorousness, stinkiness |
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| (noun) the property of producing abundantly and sustaining vigorous and luxuriant growth | Synonyms: fertility, prolificacy, richness |
| ransacking | (noun) a thorough search for something (often causing disorder or confusion) | Synonyms: rummage |
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| ransom | (noun) the act of freeing from captivity or punishment | - |
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| (noun) payment for the release of someone | - |
| (noun) money demanded for the return of a captured person | Synonyms: ransom money |
| ransomware | (noun) malicious software that makes a computer unusable unless a payment is made to the attacker | - |
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| rant | (noun) pompous or pretentious talk or writing | Synonyms: blah, bombast, claptrap, fustian |
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| (noun) a loud bombastic declamation expressed with strong emotion | Synonyms: harangue, ranting |
| ranter | (noun) someone who rants and raves; speaks in a violent or loud manner | Synonyms: raver |
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| ranting | (noun) a loud bombastic declamation expressed with strong emotion | Synonyms: harangue, rant |
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| ranula | (noun) a cyst on the underside of the tongue | - |
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| rap | (noun) the act of hitting vigorously | Synonyms: belt, knock, whack, whang |
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| (noun) a reproach for some lapse or misdeed | Synonyms: blame |
| (noun) voluble conversation | - |
| (noun) genre of African-American music of the 1980s and 1990s in which rhyming lyrics are chanted to a musical accompaniment; several forms of rap have emerged | Synonyms: hip-hop, rap music |
| (noun) the sound made by a gentle blow | Synonyms: pat, tap |
| (noun) a gentle blow | Synonyms: strike, tap |
| rapaciousness | (noun) extreme gluttony | Synonyms: edacity, esurience, rapacity, voraciousness, voracity |
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| (noun) an excessive desire for wealth (usually in large amounts) | Synonyms: greediness, voraciousness |
| (noun) (of an animal, usually a bird) The quality of subsisting off live prey. | Synonyms: predaceousness, predaciousness, rapacity |
| 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 |
| rape | (noun) the crime of forcing a person to submit to sexual intercourse against his or her will | Synonyms: assault, ravishment, violation |
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| (noun) the act of despoiling a country in warfare | Synonyms: rapine |
| (noun) Eurasian plant cultivated for its seed and as a forage crop | Synonyms: Brassica napus, colza |
| raper | (noun) someone who forces another to have sexual intercourse | Synonyms: rapist |
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| rapeseed | (noun) seed of rape plants; source of an edible oil | - |
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| raphe | (noun) a ridge that forms a seam between two parts | Synonyms: rhaphe |
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| raphia | (noun) leaf fibers of the raffia palm tree; used to make baskets and mats etc. | Synonyms: raffia |
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| rapid | (noun) a part of a river where the current is very fast | - |
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| rapidity | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidness, speediness |
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| rapidness | (noun) a rate that is rapid | Synonyms: celerity, quickness, rapidity, speediness |
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| rapier | (noun) a straight sword with a narrow blade and two edges | Synonyms: tuck |
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| rapine | (noun) the act of despoiling a country in warfare | Synonyms: rape |
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| rapist | (noun) someone who forces another to have sexual intercourse | Synonyms: raper |
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| rappee | (noun) strong snuff made from dark coarse tobacco | - |
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| rappel | (noun) (mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body | Synonyms: abseil |
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| rappeller | (noun) a person who descends down a nearly vertical face by using a doubled rope that is wrapped around the body and attached to some high point | Synonyms: abseiler |
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| rapper | (noun) a device (usually metal and ornamental) attached by a hinge to a door | Synonyms: doorknocker, knocker |
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| (noun) someone who performs rap music | - |
| rapport | (noun) a relationship of mutual understanding or trust and agreement between people | Synonyms: resonance |
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| rapporteur | (noun) a recorder appointed by a committee to prepare reports of the meetings | - |
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| rapprochement | (noun) the reestablishing of cordial relations | Synonyms: reconciliation |
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| rapscallion | (noun) one who is playfully mischievous | Synonyms: imp, monkey, rascal, scalawag, scallywag, scamp |
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| (noun) a deceitful and unreliable scoundrel | Synonyms: knave, rascal, rogue, scalawag, scallywag, varlet |
| raptor | (noun) any of numerous carnivorous birds that hunt and kill other animals | Synonyms: bird of prey, raptorial bird |
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| rapture | (noun) a state of being carried away by overwhelming emotion | Synonyms: ecstasy, exaltation, raptus, transport |
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| (noun) a state of elated bliss | Synonyms: ecstasy |
| raptus | (noun) a state of being carried away by overwhelming emotion | Synonyms: ecstasy, exaltation, rapture, transport |
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| (noun) a sudden occurrence (or recurrence) of a disease | Synonyms: ictus, seizure |
| rarebit | (noun) cheese melted with ale or beer served over toast | Synonyms: Welsh rabbit, Welsh rarebit |
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| rarefaction | (noun) a decrease in the density of something | - |
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| rareness | (noun) noteworthy scarcity | Synonyms: infrequency, rarity |
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| rariora | (noun) (plural) rare collector's items | - |
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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 |
| 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 |
| 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 |
| rash | (noun) a series of unexpected and unpleasant occurrences | Synonyms: blizzard |
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| (noun) any red eruption of the skin | Synonyms: efflorescence, roseola, skin rash |
| rasher | (noun) a commercially important fish of the Pacific coast of North America | Synonyms: Sebastes miniatus, vermillion rockfish |
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| rashness | (noun) the trait of giving little thought to danger | Synonyms: foolhardiness, recklessness |
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| (noun) the trait of acting rashly and without prudence | Synonyms: heedlessness, mindlessness |
| rasp | (noun) a coarse file with sharp pointed projections | Synonyms: wood file |
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| (noun) uttering in an irritated tone | Synonyms: rasping |
| raspberry | (noun) a cry or noise made to express displeasure or contempt | Synonyms: bird, boo, Bronx cheer, hiss, hoot, razz, razzing, snort |
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| (noun) red or black edible aggregate berries usually smaller than the related blackberries | - |
| (noun) woody brambles bearing usually red but sometimes black or yellow fruits that separate from the receptacle when ripe and are rounder and smaller than blackberries | Synonyms: raspberry bush |
| raspiness | (noun) (of sound) The state or characteristic of being rough or raw, especially used to describe vocal quality. | - |
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| rasping | (noun) uttering in an irritated tone | Synonyms: rasp |
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| rassling | (noun) the sport of hand-to-hand struggle between unarmed contestants who try to throw each other down | Synonyms: grappling, wrestling |
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| raster | (noun) the rectangular formation of parallel scanning lines that guide the electron beam on a television screen or a computer monitor | - |
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| rat | (noun) any of various long-tailed rodents similar to but larger than a mouse | - |
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| (noun) a pad (usually made of hair) worn as part of a woman's coiffure | - |
| (noun) a person who is deemed to be despicable or contemptible | Synonyms: bum, crumb, dirty dog, git, lowlife, puke, rotter, scum bag, scumbag, skunk, so-and-so, stinker, stinkpot |
| (noun) someone who works (or provides workers) during a strike | Synonyms: blackleg, scab, strikebreaker |
| (noun) one who reveals confidential information to the police or other authority | Synonyms: betrayer, blabber, informer, squealer |
| 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 |
| ratables | (noun) property that provides tax income for local governments | Synonyms: rateables |
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| ratafee | (noun) sweet liqueur made from wine and brandy flavored with plum or peach or apricot kernels and bitter almonds | Synonyms: ratafia |
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| ratafia | (noun) sweet liqueur made from wine and brandy flavored with plum or peach or apricot kernels and bitter almonds | Synonyms: ratafee |
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| (noun) macaroon flavored with ratafia liqueur | Synonyms: ratafia biscuit |
| ratan | (noun) a switch made from the stems of the rattan palms | Synonyms: rattan |
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| rataplan | (noun) the sound made by beating a drum | Synonyms: drumbeat, rub-a-dub |
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| ratatouille | (noun) a vegetable stew; usually made with tomatoes, eggplant, zucchini, peppers, onion, and seasonings | - |
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| ratch | (noun) mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction | Synonyms: rachet, ratchet |
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| ratchet | (noun) mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction | Synonyms: rachet, ratch |
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| rate | (noun) the relative speed of progress or change | Synonyms: pace |
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| (noun) amount of a charge or payment relative to some basis | Synonyms: charge per unit |
| (noun) a quantity or amount or measure considered as a proportion of another quantity or amount or measure | - |
| (noun) a magnitude or frequency relative to a time unit | - |
| rateability | (noun) the state of being liable to assessment or taxation | Synonyms: ratability |
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| rateables | (noun) property that provides tax income for local governments | Synonyms: ratables |
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| ratel | (noun) nocturnal badger-like carnivore of wooded regions of Africa and southern Asia | Synonyms: honey badger, Mellivora capensis |
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| ratepayer | (noun) a person who pays local rates (especially a householder) | - |
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| rates | (noun) a local tax on property | - |
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| rathole | (noun) a small dirty uncomfortable room | - |
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| (noun) a hole (as in the wall of a building) made by rats | - |
| rathskeller | (noun) a tavern below street level featuring beer; originally a German restaurant in the basement of city hall | - |
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| ratification | (noun) making something valid by formally ratifying or confirming it | Synonyms: confirmation |
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| ratifier | (noun) someone who expresses strong approval | Synonyms: endorser, indorser, subscriber |
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| rating | (noun) act of ascertaining or fixing the value or worth of | Synonyms: evaluation |
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| (noun) an appraisal of the value of something | Synonyms: evaluation, valuation |
| (noun) standing or position on a scale | - |
| (noun) rank in a military organization | Synonyms: military rank, military rating, paygrade |
| ratio | (noun) the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree | Synonyms: proportion |
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| (noun) the relative magnitudes of two quantities (usually expressed as a quotient) | - |
| ratiocination | (noun) logical and methodical reasoning | - |
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| (noun) the proposition arrived at by logical reasoning (such as the proposition that must follow from the major and minor premises of a syllogism) | Synonyms: conclusion |
| ratiocinator | (noun) someone who reasons logically | Synonyms: reasoner |
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| ration | (noun) the food allowance for one day (especially for service personnel) | - |
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| (noun) a fixed portion that is allotted (especially in times of scarcity) | - |
| rational | (noun) an integer or a fraction | Synonyms: rational number |
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| rationale | (noun) (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature) | Synonyms: principle |
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| rationalisation | (noun) systematic organization; the act of organizing something according to a system or a rationale | Synonyms: rationalization, systematisation, systematization |
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| (noun) (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation | Synonyms: rationalization |
| (noun) the organization of a business according to scientific principles of management in order to increase efficiency | Synonyms: rationalization |
| (noun) the cognitive process of making something seem consistent with or based on reason | Synonyms: rationalization |
| (noun) (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening | Synonyms: rationalization |
| rationalism | (noun) the doctrine that reason is the right basis for regulating conduct | Synonyms: freethinking |
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| (noun) (philosophy) the doctrine that knowledge is acquired by reason without resort to experience | - |
| (noun) the theological doctrine that human reason rather than divine revelation establishes religious truth | - |
| rationalist | (noun) someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes | Synonyms: positivist |
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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 |
| rationalization | (noun) systematic organization; the act of organizing something according to a system or a rationale | Synonyms: rationalisation, systematisation, systematization |
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| (noun) (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation | Synonyms: rationalisation |
| (noun) the organization of a business according to scientific principles of management in order to increase efficiency | Synonyms: rationalisation |
| (noun) the cognitive process of making something seem consistent with or based on reason | Synonyms: rationalisation |
| (noun) (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening | Synonyms: rationalisation |
| rationalness | (noun) the quality of being consistent with or based on logic | Synonyms: rationality |
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| rationing | (noun) the act of rationing | - |
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| ratite | (noun) flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches, cassowaries, emus, moas, rheas, kiwis, elephant birds | Synonyms: flightless bird, ratite bird |
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