Definition for Rational:

• Expressing the type, structure, relations, and reactions of a compound; graphic; -- said of formulae. See under Formula.

Synonyms for Rational:

• adj.

  •believable (adjective)
  • credible.
  •calculational (adjective)
  • computational,
  • suppositional,
  • numerical,
  • arithmetic,
  • algorithmic,
  • mathematical,
  • proportional,
  • geometric,
  • methodical,
  • calculational,
  • statistical,
  • approximate,
  • Systematical,
  • judgmental,
  • valuational,
  • algebraic.
  •calm (adjective)
  • level-headed.
  •commonsensical (adjective)
  • commonsensible.
  •compos mentis (adjective)
  • mentally sound.
  •intellectual (adjective)
  • intellectual,
  • phrenic,
  • highbrowed,
  • psychological,
  • understanding,
  • cerebral,
  • brainy,
  • intelligent,
  • egghead,
  • thinking,
  • reasoning.
  •intelligent (adjective)
  • well-informed,
  • all there.
  •levelheaded (adjective)
  • coolheaded,
  • in one's right mind,
  • levelheaded.
  •persuasive (adjective)
  • convincing.
  •ratiocinative (adjective)
  • ratiocinative.
  •realistic; of sound mind (adjective)
  • sagacious,
  • normal,
  • all there,
  • knowing,
  • lucid,
  • perspicacious,
  • logical,
  • levelheaded,
  • analytical,
  • sober,
  • intellectual,
  • ratiocinative,
  • enlightened,
  • circumspect,
  • intelligent,
  • wise,
  • together,
  • thinking,
  • collected,
  • reasoning,
  • well-advised,
  • calm,
  • stable,
  • judicious,
  • far-sighted,
  • cerebral,
  • sane,
  • reasonable,
  • synthetic,
  • cool,
  • balanced,
  • sound,
  • thoughtful,
  • discerning,
  • cognitive,
  • objective,
  • sensible,
  • reflective,
  • deliberate,
  • impartial,
  • philosophic,
  • prudent,
  • deductive,
  • discriminating.
  •reasonable (adjective)
  • likely,
  • unexcessive,
  • tenable,
  • conceivable,
  • sound,
  • logical,
  • sensible,
  • deductive,
  • reasonable,
  • intelligent,
  • inductive,
  • wise,
  • cogent,
  • plausible,
  • thought-out,
  • within reason,
  • feasible,
  • cognitive,
  • thinking.
  •reflective (adjective)
  • philosophical.
  •ruminative (adjective)
  • ruminative.
  •sane (adjective)
  • lucid,
  • normal,
  • balanced,
  • sensible,
  • right,
  • realistic,
  • well-balanced,
  • sane,
  • Sober-minded,
  • clearheaded,
  • down-to-earth,
  • compos mentis,
  • of sound mind,
  • responsible,
  • reasonable.
  •sober (adjective)
  • unexcited,
  • Clear-headed,
  • disciplined,
  • unimpassioned.
  •sound (adjective)
  • well-founded.
  •tenable (adjective)
  • arguable.

• adv

  •a priori (adverb)
  • deductive.

• n.

  •
  • discriminating,
  • deliberate,
  • circumspect,
  • collected,
  • level-headed,
  • conscious,
  • absurd,
  • together,
  • thoughtful,
  • Grounded,
  • irrational,
  • philosophic,
  • prudent,
  • practical,
  • stable,
  • sober,
  • calm,
  • impartial,
  • enlightened,
  • systematic,
  • synthetic,
  • ratiocinative,
  • Clear-headed,
  • reflective,
  • mature,
  • analytical,
  • knowing,
  • pragmatic,
  • objective,
  • cool.
  •
  • analytic,
  • reason.
  •
  • well-founded,
  • well-grounded,
  • sapient,
  • commonsensical,
  • commonsensible,
  • levelheaded.
  •
  • consequent.
  •quantity (noun)
  • rational number.
  •rational (noun)
  • intellectual,
  • noetic,
  • mental,
  • demythologized,
  • reasoning,
  • lucid,
  • coherent,
  • demythologised,
  • sane,
  • thinking,
  • reasonable,
  • intelligent,
  • logical.

• Other synonyms:

  •
  • discriminating,
  • pragmatist,
  • steady,
  • politic,
  • dependable,
  • imperturbable,
  • even-tempered,
  • thoughtful,
  • rationally,
  • commonsensible,
  • sensibly,
  • proactive,
  • healthy,
  • well-advised,
  • levelheaded,
  • well-grounded,
  • Cool-headed,
  • responsibly,
  • pragmatic,
  • philosophical,
  • commonsensical,
  • collected,
  • ratiocinative,
  • analytical,
  • analytic,
  • centred,
  • advisable,
  • Clear-headed,
  • businesslike,
  • practically,
  • justifiable,
  • earthbound,
  • enlightened,
  • unflappable.
  •
  • coherence,
  • responsible,
  • well-founded,
  • realism,
  • reason,
  • realist,
  • emotional,
  • sagacious,
  • consequent.
  •
  • prudent,
  • sapient,
  • moderate,
  • regular.
  •
  • concrete,
  • mature.
  •
  • sense.
  •
  • open.
  •allowable
  • admissible.
  •anthropoid
  • human.
  •discerning
  • perceptive.
  •dispassionate
  • unimpassioned.
  •matter of fact
  • practical.
  •practical
  • hardheaded.
  •sensible
  • common sense.
  •wise
  • level-headed.
  •Other relevant words:
  • even,
  • emotional,
  • careful,
  • infinity,
  • idealized,
  • percipient,
  • uniformly,
  • articulate,
  • well-adjusted,
  • irrational number,
  • fairness,
  • well-advised,
  • acute,
  • bright,
  • circumspect,
  • coherence,
  • fitting,
  • unruffled,
  • evenly,
  • rational number,
  • broad-minded,
  • prudent,
  • contemplative,
  • deliberate,
  • creditable,
  • proper,
  • multiplicand,
  • forceful,
  • Equitableness,
  • imperturbable,
  • plainly,
  • shade,
  • realism,
  • credible,
  • ideational,
  • earthbound,
  • grounds,
  • not excessive,
  • mild,
  • modest,
  • logarithmic,
  • solemn,
  • pragmatical,
  • judicious,
  • healthy,
  • subjective,
  • impartial,
  • levelheaded,
  • quiet,
  • soundly,
  • probable,
  • Sharp-witted,
  • circulating decimal,
  • justified,
  • canny,
  • impair,
  • justice,
  • composed,
  • inference,
  • numeral,
  • thoughtless,
  • Repetend,
  • everyday,
  • noetic,
  • Figurate,
  • analytic,
  • just,
  • highbrow,
  • demythologized,
  • erudite,
  • spiritual,
  • rationality,
  • unexcited,
  • thoughtful,
  • even-tempered,
  • internal,
  • synthetic,
  • metaphysical,
  • conscious,
  • Levelly,
  • transcendental number,
  • keen,
  • numerator,
  • multiplier,
  • temperate,
  • tactful,
  • presumptive,
  • Grounded,
  • mentally sound,
  • considered,
  • ideal,
  • justifiable,
  • dividend,
  • enlightened,
  • well thought out,
  • well-grounded,
  • principle,
  • reason why,
  • compos mentis,
  • intelligently,
  • sagely,
  • sage,
  • flatly,
  • equity,
  • notional,
  • sum,
  • insightful,
  • Business-like,
  • quick,
  • Overtly,
  • persuasive,
  • restrained,
  • civilized,
  • self-possessed,
  • Unideal,
  • abstract,
  • argumentation,
  • Suppositive,
  • Sophic,
  • clear-sighted,
  • Psychologic,
  • lofty,
  • theoretical,
  • Multiplicator,
  • integer,
  • impossible,
  • aliquot,
  • impartiality,
  • understandable,
  • staid,
  • knowledgeable,
  • evidently,
  • discriminative,
  • cardinal,
  • obviously,
  • acceptable,
  • incontrovertible,
  • sense,
  • plausibly,
  • of sound mind,
  • open,
  • Hyperphysical,
  • unexcessive,
  • savvy,
  • philosophic,
  • carefully,
  • evenhanded,
  • reflective,
  • in one's right mind,
  • well-founded,
  • clearheaded,
  • sedate,
  • proactive,
  • cause,
  • useful,
  • supposititious,
  • tranquil,
  • keen-sighted,
  • liberalistic,
  • no-nonsense,
  • precept,
  • within reason,
  • right-minded,
  • impractical,
  • common measure,
  • integral,
  • hypothetical,
  • subtrahend,
  • real,
  • Unpractical,
  • tenable,
  • weighty,
  • disciplined,
  • admissible,
  • proved,
  • reasoned,
  • mental,
  • Numerative,
  • product,
  • ghostly,
  • presentable,
  • pair,
  • informed,
  • valid,
  • aliquot part,
  • simply,
  • able,
  • multiple,
  • justifiably,
  • meditative,
  • diplomatic,
  • serene,
  • solid,
  • coherent,
  • sagacious,
  • quotient,
  • scientific,
  • authoritative,
  • quick-witted,
  • absurd,
  • cool,
  • positivistic,
  • orderly,
  • strong-minded,
  • indisputable,
  • odd,
  • psychic,
  • level-headed,
  • finite,
  • rationally,
  • scholarly,
  • hard-boiled,
  • wholesome,
  • Ratiocinatory,
  • speculative,
  • sober,
  • reciprocal,
  • unrealistic,
  • suppositious,
  • Cool-headed,
  • sound-thinking,
  • infinite,
  • true-life,
  • convincingly,
  • far-sighted,
  • clever,
  • subliminal,
  • brilliant,
  • smart,
  • ratiocination,
  • difference,
  • positive,
  • Keen-witted,
  • regular,
  • prime factor,
  • deduction,
  • factor,
  • transcendental,
  • discreet,
  • forbearing,
  • in the know,
  • dignified,
  • unromantic,
  • well-argued,
  • crafty,
  • totient,
  • dispassionate,
  • negative,
  • practical-minded,
  • prudently,
  • magnitude relation,
  • open-minded,
  • sharp,
  • judiciously,
  • responsibly,
  • secular,
  • workable,
  • pragmatic,
  • supportable,
  • demythologised,
  • advisable,
  • clear,
  • imaginable,
  • viable,
  • complex conjugate,
  • analytical,
  • naturalistic,
  • practically,
  • liberal,
  • exponential,
  • conjectural,
  • rule,
  • arithmetical,
  • justness,
  • decidedly,
  • learned,
  • right,
  • defensible,
  • numeric,
  • differential,
  • perceptual,
  • complex number,
  • provable,
  • scientistic,
  • fractional,
  • au fait,
  • unsentimental,
  • sophisticated,
  • well-ordered,
  • distinctly,
  • consistent,
  • businesslike,
  • maintainable,
  • hard,
  • organized,
  • cleverly,
  • responsible,
  • cognitive,
  • wisely,
  • equally,
  • clearly,
  • intellect,
  • pragmatically,
  • equable,
  • forcefully,
  • convincing,
  • perspicacious,
  • human,
  • controlled,
  • alert,
  • commonsensical,
  • equitable,
  • good,
  • argument,
  • dependable,
  • logically,
  • ruminative,
  • logic,
  • rationale,
  • reliable,
  • matter of fact,
  • serious,
  • perspicuous,
  • believable,
  • unimpassioned,
  • prime,
  • politic,
  • prime number,
  • fraction,
  • Noological,
  • systematic,
  • coherently,
  • the big idea,
  • apt,
  • knowing,
  • digital,
  • divisor,
  • potent,
  • possible,
  • ordinal,
  • highbrowed,
  • discursive,
  • worldly,
  • complement,
  • reasonableness,
  • unflustered,
  • reason,
  • esoteric,
  • long-headed,
  • decimal,
  • discriminating,
  • earthy,
  • mature,
  • powerful,
  • tough-minded,
  • shrewd,
  • perceptive,
  • educated,
  • coefficient,
  • Superphysical,
  • Clear-headed,
  • Animastic,
  • consequent,
  • Submultiple,
  • defendable,
  • conceptual,
  • sapient,
  • Logometric,
  • arguable,
  • cogitative,
  • pragmatist,
  • figurative,
  • commonsensible,
  • quantitative relation,
  • Hard-headed,
  • stable,
  • calm,
  • commonsense,
  • hardheaded,
  • thinkable,
  • irrefutable,
  • firm,
  • pensive,
  • mixed number,
  • literate,
  • legitimate,
  • manifestly,
  • practical,
  • unflappable,
  • moderately,
  • objective,
  • collected,
  • fairly,
  • earnest,
  • openly,
  • idealistic,
  • imaginary,
  • unperturbed,
  • discerning,
  • cultivated,
  • patently,
  • figural,
  • persuasively,
  • psychical,
  • unidealistic,
  • surd,
  • together,
  • ground,
  • conceptive,
  • subconscious,
  • denominator,
  • philosophical,
  • sensibly,
  • ingeniously,
  • incontestable,
  • tough,
  • aware,
  • steady,
  • moderate,
  • coolheaded,
  • all there,
  • Numerary,
  • trustworthy,
  • realist,
  • astute,
  • comprehensible,
  • common sense,
  • explanation,
  • fair,
  • concrete,
  • gifted,
  • in reason,
  • apparently,
  • hard-nosed,
  • complex,
  • well-informed,
  • centred,
  • phrenic,
  • radical,
  • ratiocinative,
  • well-organized,
  • clear-eyed.

Antonyms for Rational:

• adj.

  • all
    irrational.
  • pert
    irrational.
  • realistic; of sound mind
    illogical, unrealistic, unsound, idiotic, senseless, foolish, unstable, unintelligent, ridiculous, stupid, agitated, nonsensical, insane, thoughtless, unbalanced, excited, unreasonable, unsystematic, unwise, careless, irrational, confused.
  • Other antonyms:
    blind, foolish, uncompelling, unwarranted, Daffy, nonintellectual, nonsensical, unsubstantiated, false, invalid, unscientific, unjustified, mindless, thickheaded, unsound, illogical, dumb, silly, dense, Eristic, cockeyed, undiscerning, reasonless, nutty, illegitimate, absurd, harebrained, inconsequent, doltish, flimsy, misguided, sottish, incoherent, groundless, physical, inconsequential, unsupported, simple, nonrational, superstitious, casuistic, unthinking, simpleminded, weak, Weak-minded, mad, unreasoning, irrational, thoughtless, fatuous, sophistic, nonthinking, slow, uninformed, insane, half-baked, dopey, specious, witless, fallacious, unintelligent, implausible, loony, crazy, futile, dorky, preposterous, brainless, misleading, unfounded, unconvincing, dull, unarticulated, Unreasoned, unreasonable, ignorant, nonvalid, half-witted, obtuse, senseless.

• Other antonyms:

  • n. t.
    absurd, agitated, blind, brainless, careless, casuistic, cockeyed, confused, crazy, dense, doltish, dopey, dull, dumb, excited, fallacious, false, fatuous, flimsy, foolish, half-baked, half-witted, harebrained, idiotic, illegitimate, illogical, implausible, incoherent, inconsequent, inconsequential, insane, invalid, irrational, mad, mindless, misguided, misleading, nonrational, nonsensical, nutty, reasonless, ridiculous, senseless, slow, sophistic, specious, superstitious, thickheaded, thoughtless, unarticulated, unbalanced, unconvincing, unfounded, uninformed, unintelligent, unjustified, unlogical, unrealistic, unreasonable, unreasoning, unscientific, unsound, unstable, unsubstantiated, unsupported, unsystematic, unthinking, unwarranted, unwise, weak, witless, Eristic, Misled, Unreasoned, Weak-minded, Daffy, nonthinking, simpleminded, dorky, nonvalid, uncompelling, stupid.