56 entries under foolish topic. ×
| illogical(adjective, feature, state, correct, condition) | |
| unsound(adjective, bad, weak, correct, wrong) | |
| fallacious(adjective, correct, wrong, fake, false) | |
| wrong(adjective, bad, fake, false, counterfeit) | |
| mad(adjective, crazy, unreasonable, ill) | |
| groundless(unreasonable, reasoning, irrational, illogical) | |
| irrational(adjective, wrong, false, crazy) | |
| sophistic(adjective, correct, true, unreasonable) | |
| unreasonable(adjective, fantastic, reasoning, irrational) | |
| senseless(adjective, wrong, false, stupid) | |
| specious(adjective, correct, wrong, fake, false) | |
| reasonless(adjective, unreasonable, irrational, worthless) | |
| unfounded(adjective, wrong, fake, false, counterfeit) | |
| absurd(adjective, unreasonable, fantastic, absurd) | |
| baseless(adjective, unreasonable, worthless, unacceptable) | |
| crazy(adjective, unreasonable, absurd, illogical) | |
| ludicrous(adjective, fantastic, absurd) | |
| nonsensical(adjective, wrong, stupid, crazy) | |
| preposterous(adjective, unreasonable, absurd, irrational) | |
| ridiculous(adjective, unreasonable, absurd, illogical) |
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| APA | Smart Define. (2016). invalid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, invalid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>. |
| MLA | Smart Define. "invalid thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms> |