- Definitions|2
- Thesaurus|3.2k
- Abbreviations|0
89 entries under expression topic. ×
| of unsound mind(adjective, idiom, characteristic, silly) | |
| non compos mentis(adjective, idiom, law, mad) | |
| mentally ill(adjective, idiom, mad, sane) | |
| mental patient(person, insanity, craziness) | |
| not all there(adjective, idiom, crazy, unstable) | |
| out to lunch(adjective, idiom, silly, crazy) | |
| round the bend(idiom, silly, foolish, mad) | |
| not right(idiom, crazy, insanity, cuckoo) | |
| around the bend(adjective, idiom, wrong, wild) | |
| bats in the belfry(idiom, silly, foolish, mad) | |
| bereft of reason(idiom, insanity) | |
| beside oneself(adjective, idiom, upset, violent) | |
| flipped out(adjective, wild, silly, foolish) | |
| freaked out(adjective, wild, silly, foolish) | |
| mad as a hatter(adjective, idiom, silly, foolish) | |
| nutty as fruitcake(idiom, silly, foolish, mad) | |
| out of it(adjective, idiom) | |
| mad as a March hare(idiom, silly, foolish, mad) | |
| acting crazy(adjective, silly, foolish, crazy) | |
| at fever pitch |
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| APA | Smart Define. (2015). insane thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/insane/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "insane thesaurus" https://smartdefine.org/insane/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, insane thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/insane/thesaurus/synonyms>. |
| MLA | Smart Define. "insane thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/insane/thesaurus/synonyms> |