Synonyms and Antonyms of valid
1 according to the rules of logic your argument isn't valid because you're taking what should be the conclusion and using it as a premise Synonyms of valid analytic (or analytical), coherent, consequent, good, rational, reasonable, sensible, sound, logical, well-founded, well-groundedWords Related to valid a posteriori, a priori, syllogistic; cognitive, empirical (also empiric); defendable, defensible, justifiable, maintainable, supportable, sustainable, tenableNear Antonyms of valid casuistic (or casuistical), eristic (also eristical), fallacious, misleading, sophistic (or sophistical), specious; unarticulated; unscientific; absurd, cockeyed, crazy, daffy, fatuous, half-baked, half-witted, harebrained, insane, loony (also looney), mad, nonsensical, nutty, preposterous, simpleminded, stupid, weak-minded, witless; senseless, thoughtless; uncompelling, unconvincingAntonyms of valid illegitimate, illogical, incoherent, inconsequent, inconsequential, invalid, irrational, unreasonable, unsound, weak
2 based on sound reasoning or information only further investigation will show whether your theory is valid Synonyms of valid commonsense, commonsensible, commonsensical, firm, hard, informed, just, justified, levelheaded, logical, rational, reasonable, reasoned, sensible, sober, solid, good, well-foundedWords Related to valid actual, real, true; certain, sure; certified, validated, verified; confirmed, corroborated, substantiated; cogent, convincing; colorable, credible, plausibleNear Antonyms of valid unsubstantiated, unsupported, unwarranted; flimsy, implausible, unconvincing, weak; fallacious, false, misguided, misledAntonyms of valid groundless, illogical, invalid, irrational, nonrational, nonsensical, nonvalid, unfounded, uninformed, unjustified, unreasonable, unreasoned, unsound
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