| mad(adjective, crazy, insane) | |
| insane(adjective, sound, sensible, foolish, stupid) | |
| crazy(adjective, calm, sound, strange, stupid) | |
| trippy(state, behavior) | |
| paranoid | |
| unreasonable(adjective, stupid, insane) | |
| silly | |
| goofy | |
| wild(adjective, reasonable, sensible) | |
| unstable(adjective, stupid, insane) | |
| batty(adjective, crazy) | |
| lunatic(noun, adjective, person, reasonable, crazy) | |
| unsound(adjective, strong, sound, stupid, well) | |
| daydreamer | |
| demented | |
| foolish(adjective, sound, stupid, wise, insane) | |
| irrational(adjective, sound, stupid, rational, insane) | |
| balmy(adjective, violent, insane) | |
| deranged | |
| crazed |
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| APA | Smart Define. (2015). sane thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sane/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "sane thesaurus" https://smartdefine.org/sane/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, sane thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sane/thesaurus/antonyms>. |
| MLA | Smart Define. "sane thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/sane/thesaurus/antonyms> |