| mad(adjective, crazy, insane) | |
| crazy(calm, sound) | |
| insane(adjective, sound, sensible, careless, foolish) | |
| trippy(state, behavior) | |
| silly | |
| unreasonable(adjective, careless, stupid, illogical) | |
| paranoid | |
| foolish(adjective, sound, careless, stupid, wise) | |
| visceral | |
| irrational(adjective, sound, careless, stupid, senseless) | |
| illogical(adjective, right, careless, sense, stupid) | |
| absurd(adjective, senseless, ridiculous) | |
| daydreamer | |
| fatuous | |
| loony | |
| superstitious | |
| balmy(adjective, violent, insane) | |
| dopey | |
| groundless | |
| mindless |
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| APA | Smart Define. (2016). rational thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rational/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, rational thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rational/thesaurus/antonyms>. |
| MLA | Smart Define. "rational thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/rational/thesaurus/antonyms> |