56 entries under foolish topic. ×
| silly(adjective, unreasonable, absurd, irrational) | |
| stupid(adjective, wrong, crazy, unreasonable) | |
| unreasoning(unreasonable, irrational, illogical, arbitrary) | |
| demented(unreasonable, ill, unhealthy, frail) | |
| insane(unreasonable, ill, unhealthy, frail) | |
| nutty(unreasonable, irrational, illogical, unreasoned) | |
| unstable(adjective, wrong, false, stupid) | |
| unwise(adjective, wrong, stupid, crazy) | |
| wacky(unreasonable, irrational, illogical, unreasoned) | |
| aberrant(unreasonable, fantastic, illogical) | |
| bananas | |
| brainless(unreasonable, illogical) | |
| cockamamie(unreasonable, illogical) | |
| delirious(unreasonable, illogical) | |
| disconnected(unreasonable, illogical) | |
| disjointed(unreasonable, illogical) | |
| distracted | |
| distraught(unreasonable, illogical) | |
| fantastic | |
| flaky(unreasonable, illogical) |
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| APA | Smart Define. (2016). invalid thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, invalid thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>. |
| MLA | Smart Define. "invalid thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms> |