- Definitions|0
- Thesaurus|95
- Abbreviations|0
| fatuous(silly, foolish, unwise) | |
| foolhardy(silly, foolish, unwise) | |
| foolish(silly, unwise) | |
| goofy(silly, foolish, unwise) | |
| half-baked(silly, foolish, unwise) | |
| harebrained(silly, foolish, unwise) | |
| ill-conceived(silly, foolish, unwise) | |
| impracticable(silly, foolish, unwise) | |
| imprudent(silly, foolish, unwise) | |
| inane(silly, foolish, unwise) | |
| inappropriate(silly, foolish, unwise) | |
| irrational(silly, foolish, unwise) | |
| irresponsible(silly, foolish, unwise) | |
| loony(silly, foolish, unwise) | |
| ludicrous(silly, foolish, unwise) | |
| nonsensical(silly, foolish, unwise) | |
| odd(silly, foolish, unwise) | |
| out of all reason(expression, idiom, silly, foolish, unwise) | |
| outlandish(silly, foolish, unwise) | |
| outrageous(silly, foolish, unwise) |
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| APA | Smart Define. (1970). mentally strange thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mentally_strange/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "mentally strange thesaurus" https://smartdefine.org/mentally_strange/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 1970, mentally strange thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mentally_strange/thesaurus/synonyms>. |
| MLA | Smart Define. "mentally strange thesaurus" 1 January 1970. Web. 28 September 2026. <https://smartdefine.org/mentally_strange/thesaurus/synonyms> |