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rational - 20 thesaurus results
| Main Entry: | rational |
| Part of Speech: | adjective |
| Definition: | realistic; of sound mind |
| Synonyms: | analytical, balanced, calm, cerebral, circumspect, collected, cool*, deliberate, discerning, discriminating, enlightened, far-sighted, impartial, intellectual, intelligent, judicious, knowing, levelheaded, logical, lucid, normal, objective, perspicacious, prudent, reasonable, reasoning, reflective, sagacious, sane, sensible, sober, sound, stable, synthetic, thinking, thoughtful, together, well-advised, wise, all there, cognitive, deductive, philosophic, ratiocinative |
| Antonyms: | irrational, ridiculous, unrealistic, unreasonable, unsound |
* = informal/non-formal usage
| Main Entry: | admissible |
| Part of Speech: | adjective |
| Definition: | able or deserving of consideration; allowable |
| Synonyms: | acceptable, applicable, appropriate, fair, fitting, just, justifiable, lawful, legal, legitimate, licit, likely, logical, okay, passable, permissible, permitted, pertinent, possible, probable, proper, rational, reasonable, relevant, right, suitable, tolerable, warranted, worthy, allowed, concedable, not impossible, not unlikely, tolerated |
| Antonyms: | illegitimate, inadmissible, inapplicable, irrelevant, unfair, unjust, unsuitable, wrong |
| Main Entry: | analytic/analytical |
| Part of Speech: | adjective |
| Definition: | examining and determining |
| Synonyms: | cogent, conclusive, detailed, diagnostic, discrete, explanatory, expository, inquiring, inquisitive, judicious, logical, organized, penetrating, perceptive, perspicuous, precise, questioning, rational, reasonable, scientific, searching, solid, sound, studious, subtle, systematic, testing, thorough, valid, well-grounded, dissecting, interpretive, investigative, problem-solving, ratiocinative |
| Main Entry: | believable |
| Part of Speech: | adjective |
| Definition: | trustworthy |
| Synonyms: | aboveboard, acceptable, authentic, conceivable, convincing, credible, creditable, fiduciary, honest-to-God*, imaginable, impressive, likely, persuasive, plausible, possible, presumable, presumptive, probable, rational, reasonable, reliable, satisfying, straight, tenable, tried, trusty, unquestionable, up front, colorable, credential, supposable |
| Antonyms: | inconceivable, incredible, unconvincing, unreliable, unthinkable, unbelieveable |
* = informal/non-formal usage
| Main Entry: | clever |
| Part of Speech: | adjective |
| Definition: | bright, ingenious |
| Synonyms: | able, adept, adroit, alert, apt, astute, brainy, brilliant, cagey, canny, capable, competent, crackerjack*, cunning, deep, dexterous/dextrous, discerning, egghead*, expert, foxy*, gifted, good, handy, intelligent, inventive, keen, knowing, knowledgeable, many-sided, nimble, nobody's fool, pretty, pro, qualified, quick, quick on trigger, quick-witted, rational, resourceful, sagacious, savvy, sensible, sharp, shrewd, skilled, skillful, slick, sly, smart, sprightly, talented, versatile, wise, witty |
| Antonyms: | awkward, foolish, idiotic, ignorant, naive, senseless, stupid, unclever |
* = informal/non-formal usage
| Main Entry: | coherent |
| Part of Speech: | adjective |
| Definition: | understandable |
| Synonyms: | articulate, comprehensible, consistent, intelligible, logical, lucid, meaningful, orderly, organized, rational, sound, systematic, identified, reasoned |
| Antonyms: | disorganized, incomprehensible, irrational, unintelligible, not understandable, unrational, unsystematic |
| Main Entry: | common-sense |
| Part of Speech: | adjective |
| Definition: | reasonable |
| Synonyms: | astute, cool, down-to-earth, judicious, levelheaded, matter-of-fact, practical, rational, realistic, sane, sensible, shrewd, sound, commonsensical, hard-headed |
| Antonyms: | foolish, impractical, insane, unreasonable, unsound, unsensible |
| Main Entry: | consequent |
| Part of Speech: | adjective |
| Definition: | resultant |
| Synonyms: | consistent, ensuing, following, indirect, intelligent, logical, rational, reasonable, sensible, sequential, sound, subsequent, successive, understandable, inferable, resulting |
| Antonyms: | beginning, originating, preparatory, starting, causal, commencing |
| Main Entry: | convincing |
| Part of Speech: | adjective |
| Definition: | persuasive |
| Synonyms: | acceptable, authentic, cogent, conclusive, credible, dependable, faithful, hopeful, impressive, incontrovertible, likely, moving, plausible, possible, powerful, presumable, probable, rational, reasonable, reliable, satisfactory, satisfying, solid, sound, telling, trustworthy, trusty, valid, believeable, swaying |
| Antonyms: | doubtful, dubious, implausible, improbable, incredible, unconvincing, unlikely, unpersuasive |
| Main Entry: | credible |
| Part of Speech: | adjective |
| Definition: | believable |
| Synonyms: | aboveboard, conceivable, conclusive, creditable, dependable, honest, imaginable, likely, plausible, possible, probable, probably, rational, reasonable, reliable, satisfactory, satisfying, seeming, sincere, solid, sound, straight, tenable, thinkable, trustworthy, trusty, up front, valid, colorable, determinative, honest to God, supposable |
| Notes: | credible means 'believable' and credulous means 'gullible' |
| Antonyms: | implausible, impossible, improbable, inconceivable, incredible, unbelievable, unimaginable, unlikely, untenable |
| Main Entry: | down-to-earth |
| Part of Speech: | adjective |
| Definition: | reasonable, practical |
| Synonyms: | common, easy, hard, hardheaded, matter-of-fact, mundane, no-nonsense, pragmatic, rational, realistic, sane, sensible, sober, commonsense, hardboiled, plainspoken, unfantastic, unidealistic, unsentimental |
| Antonyms: | excitable, excited, impractical, unreasonable, unsensible |
| Main Entry: | hard-nosed/hardheaded |
| Part of Speech: | adjective |
| Definition: | stubborn |
| Synonyms: | astute, bullheaded*, hard*, hard-boiled*, headstrong, intractable, levelheaded, mulish, obstinate, pertinacious, perverse, pigheaded*, practical, pragmatic, rational, realistic, resolute, sensible, shrewd, sober, stand pat, tough, unyielding, willful, locked in, tough-nut, unsentimental |
| Antonyms: | easy, laid-back, merciful, easy-going |
* = informal/non-formal usage
| Main Entry: | intellectual |
| Part of Speech: | adjective |
| Definition: | very smart |
| Synonyms: | bookish, brainy*, cerebral, creative, highbrow*, intelligent, inventive, learned, mental, psychological, rational, scholarly, studious, subjective, thoughtful, highbrowed, intellective, phrenic |
| Antonyms: | foolish, ignorant, simple, stupid |
* = informal/non-formal usage
| Main Entry: | intelligent |
| Part of Speech: | adjective |
| Definition: | very smart |
| Synonyms: | able, acute, alert, alive, apt, astute, brainy*, bright, brilliant, calculating, capable, clever, creative, deep*, discerning, enlightened, exceptional, highbrow*, imaginative, ingenious, instructed, inventive, keen, knowing, knowledgeable, original, penetrating, perceptive, perspicacious, profound, quick, quick-witted, rational, ready, reasonable, resourceful, responsible, sage, sharp, smart, thinking, together*, understanding, well-informed, whiz*, wise, witty, all there, comprehending |
| Antonyms: | foolish, idiotic, imbecile, stupid, unintelligent |
* = informal/non-formal usage
| Main Entry: | judicious |
| Part of Speech: | adjective |
| Definition: | wise, thoughtful |
| Synonyms: | accurate, acute, astute, calculating, careful, cautious, circumspect, considerate, considered, diplomatic, discerning, discreet, discriminating, efficacious, enlightened, expedient, far-sighted, informed, judicial, keen, perceptive, perspicacious, politic, profound, prudent, quick-witted, rational, reasonable, sagacious, sage, sane, sapient, seasonable, seemly, sensible, sharp, shrewd, skillful, sober, sophisticated, sound, thorough, wary, well-advised, worldly-wise, clear-sighted, well-judged |
| Antonyms: | foolish, hasty, idiotic, injudicious, irrational, nonsensical, reckless, senseless, thoughtless, unwise |
| Main Entry: | levelheaded |
| Part of Speech: | adjective |
| Definition: | reasonable, calm |
| Synonyms: | all there, balanced, collected, commonsensical, composed, cool, cool as cucumber, coolheaded, dependable, discreet, even-tempered, far-sighted, in one's right mind, judicious, practical, prudent, rational, sane, self-possessed, sensible, steady, together, unflappable, wise, with all marbles |
| Antonyms: | nervous, unreasonable, upset |
| Main Entry: | likely |
| Part of Speech: | adjective |
| Definition: | probable, apt, hopeful |
| Synonyms: | acceptable, achievable, anticipated, attainable, conceivable, credible, destined, disposed, expected, fair, favorite, feasible, given to, imaginable, inclined, liable, ostensible, plausible, possible, practicable, predisposed, presumable, promising, prone, rational, reasonable, seeming, subject to, tending, thinkable, true, up-and-coming*, workable, assuring, believeable, conjecturable, in favor of, in the cards, in the habit of, inferable, odds-on, on the verge of, supposable, verisimilar |
| Antonyms: | implausible, inapt, unforeseeable, unlikely |
* = informal/non-formal usage
| Main Entry: | logical |
| Part of Speech: | adjective |
| Definition: | probable, reasonable |
| Synonyms: | analytical, clear, cogent, coherent, compelling, congruent, consequent, consistent, convincing, deducible, discerning, discriminating, fair, germane, inferential, intelligent, judicious, justifiable, kosher*, legitimate, lucid, necessary, obvious, perceptive, perspicuous, pertinent, plausible, rational, relevant, sensible, sound, subtle, telling, valid, wise, analytic, commonsensical, extensional, holding together, holding water, juridicious, legit, most likely, well-organized |
| Antonyms: | illogical, improbable, irrational, unlikely, unreasonable |
* = informal/non-formal usage
| Main Entry: | perceptive |
| Part of Speech: | adjective |
| Definition: | alert, sensitive |
| Synonyms: | acute, astute, awake, aware, brainy*, conscious, discerning, discreet, ear to the ground, gnostic, incisive, insighted, insightful, intuitive, judicious, keen, knowing, knowledgeable, knows what's what, observant, penetrating, penetrative, percipient, perspicacious, quick, rational, responsive, sagacious, sage, savvy*, sharp, sophic, tuned in, wise, wise to |
| Antonyms: | dense, insensitive, unaware, unobservant |
* = informal/non-formal usage
| Main Entry: | probable |
| Part of Speech: | adjective |
| Definition: | likely to happen |
| Synonyms: | apparent, believable, credible, earthly, feasible, illusory, mortal, ostensible, plausible, possible, presumable, rational, reasonable, seeming, in the cards, most likely, odds-on, presumed |
| Antonyms: | improbable, unlikely |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.
