| schizophrenic(noun, adjective, silly, foolish, stupid) | |
| softheaded(adjective, knowledge, ability) | |
| twisted(adjective, crazy, mad, odd, insane) | |
| unreasonable(adjective, weak, simple, foolish, stupid) | |
| unstable(careless, foolish, stupid, unreasonable, unthinking) | |
| addled | |
| ape(adjective, silly, foolish, crazy, unwise) | |
| bizarre(adjective, wild, strange, silly, foolish) | |
| boneheaded(impractical, half-baked, doomed) | |
| chapped | |
| character | |
| cockamamy(silly, foolish, thoughtless, unwise, unintelligent) | |
| comical(adjective, amusing) | |
| confused(careless, stupid, unthinking, obtuse, unperceptive) | |
| crackbrained | |
| creep | |
| dement(noun, crazy, cuckoo, lunatic, lamebrain) | |
| disturbed | |
| empty-headed(careless, stupid, unthinking, obtuse, unperceptive) | |
| erratic(adjective, wild, silly, foolish, crazy) |
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| APA | Smart Define. (2015). loony thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/loony/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "loony thesaurus" https://smartdefine.org/loony/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, loony thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/loony/thesaurus/synonyms>. |
| MLA | Smart Define. "loony thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/loony/thesaurus/synonyms> |