First Known Use of well-founded
Synonymsanalytic (or analytical), coherent, consequent, good, rational, reasonable, sensible, sound, valid, well-founded, well-grounded
Antonymsillegitimate, illogical, incoherent, inconsequent, inconsequential, invalid, irrational, unreasonable, unsound, weak
Related Wordsa posteriori, a priori, syllogistic; cognitive, empirical (also empiric); defendable, defensible, justifiable, maintainable, supportable, sustainable, tenable
Near Antonymscasuistic (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, unconvincing
WELL-FOUNDED Defined for English Language Learners
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