214 entries under foolish topic. ×
| unintelligent(adjective, weak, simple, silly) | |
| baseless(unreasonable, illogical) | |
| bats in the belfry(expression, adjective, idiom, wild, strange) | |
| beyond all reason(expression, adjective, idiom, wild, silly) | |
| birdbrained(impulsive, insane, impractical, unintelligent) | |
| bone-headed | |
| chaotic(adjective, rough, silly, irrational) | |
| chuckle-headed | |
| cockamamy(silly, thoughtless, unwise, unintelligent) | |
| derailed(adjective, wrong, wild, silly) | |
| feebleminded(weak, simple, silly, thoughtless) | |
| giddy(adjective, simple, rough, careless, wild) | |
| jackass | |
| knuckle-headed | |
| lame-brained | |
| mad as a March hare(expression, adjective, idiom, wild, strange) | |
| meat-headed | |
| nerdy(weak, simple, silly, thoughtless) | |
| nitwit | |
| nutty as fruitcake(expression, adjective, idiom, wild, strange) |
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| APA | Smart Define. (2016). crazy thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/crazy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "crazy thesaurus" https://smartdefine.org/crazy/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, crazy thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/crazy/thesaurus/synonyms>. |
| MLA | Smart Define. "crazy thesaurus" 3 April 2016. Web. 23 September 2026. <https://smartdefine.org/crazy/thesaurus/synonyms> |