- Definitions|1
- Thesaurus|291
- Abbreviations|0
| foolish(adjective, silly, stupid, fantastic, unwise) | |
| frantic(adjective, foolish, fantastic, lunatic, aper) | |
| frenetic(adjective, foolish, fantastic) | |
| generative(unglued, well-built, potty) | |
| half-baked(silly, foolish, unwise) | |
| hare | |
| harebrained(silly, foolish, unwise) | |
| hatter | |
| have nobody home | |
| ill | |
| ill-conceived(adjective, wild, silly, foolish, senseless) | |
| illogical(adjective, foolish, fantastic) | |
| impracticable(silly, foolish, unwise) | |
| imprudent(adjective, silly, foolish, fantastic, unwise) | |
| inane(silly, foolish, unwise) | |
| inappropriate(silly, foolish, unwise) | |
| invalid(adjective, foolish, fantastic) | |
| kinky | |
| looney | |
| ludicrous(adjective, silly, foolish, fantastic, unwise) |
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| APA | Smart Define. (2015). of unsound mind thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/of_unsound_mind/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "of unsound mind thesaurus" https://smartdefine.org/of_unsound_mind/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, of unsound mind thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/of_unsound_mind/thesaurus/synonyms>. |
| MLA | Smart Define. "of unsound mind thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/of_unsound_mind/thesaurus/synonyms> |