- Definitions|2
- Thesaurus|3.2k
- Abbreviations|0
| crack-brained | |
| cockeyed(adjective, knowledge, ability, informal, silly) | |
| disordered(adjective, crazy, confused, irrational, distracted) | |
| distraught(adjective, upset, wrong, wild, foolish) | |
| dizzy | |
| off(adjective, sane) | |
| sappy(adjective, knowledge, slang, ability, foolish) | |
| thoughtless(adjective, silly, unwise) | |
| bananas(adjective, slang, sane) | |
| brainsick(adjective, wrong, wild, crazy, confused) | |
| buggy(adjective, slang, silly, foolish, crazy) | |
| crackbrained | |
| dumb(foolish, crazy, impractical, half-baked, doomed) | |
| fool | |
| fruity(adjective, slang, silly, foolish, mad) | |
| gaga(adjective, informal, sane, distraught, batty) | |
| half-baked(weak, simple, silly, foolish, fantastic) | |
| illogical(adjective, false, foolish, unstable, unreasonable) | |
| laughable | |
| off one's rocker(adjective, idiom, foolish, ill, sane) |
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| APA | Smart Define. (2015). insane thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/insane/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "insane thesaurus" https://smartdefine.org/insane/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, insane thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/insane/thesaurus/synonyms>. |
| MLA | Smart Define. "insane thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/insane/thesaurus/synonyms> |