173 entries under foolish topic. ×
| inappropriate(silly, fantastic, unwise, impractical) | |
| incautious(weak, simple, silly, thoughtless) | |
| indiscreet(weak, simple, silly, thoughtless) | |
| injudicious(weak, simple, careless, silly) | |
| irresponsible(adjective, wild, strange, silly) | |
| jackass | |
| knuckle-headed | |
| lame-brained | |
| mad as a March hare(expression, idiom, silly, unwise) | |
| mad as a hatter(expression, adjective, idiom, silly) | |
| meat-headed | |
| nerdy(weak, simple, silly, thoughtless) | |
| nutty as fruitcake(expression, idiom, silly, unwise) | |
| out of all reason(expression, idiom, silly, fantastic) | |
| peculiar(strange, silly, fantastic, odd) | |
| puerile(careless, silly, stupid, fantastic) | |
| quixotic(silly, fantastic, unwise, impractical) | |
| raging(silly, stupid, crazy, senseless) | |
| screw loose(expression, silly, unwise, unglued) | |
| short-sighted(weak, simple, silly, fantastic) |
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| APA | Smart Define. (2015). loony thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/loony/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "loony thesaurus" https://smartdefine.org/loony/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, loony thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/loony/thesaurus/synonyms>. |
| MLA | Smart Define. "loony thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/loony/thesaurus/synonyms> |