- Definitions|0
- Thesaurus|60
- Abbreviations|0
| loco(adjective, crazy, sick, insane, sane) | |
| buggy(adjective, sane, dotty) | |
| crackers(adjective, crazy, sick, sane) | |
| disordered(adjective, wrong, wild, crazy, mad) | |
| dotty(adjective, wrong, crazy, sick, confused) | |
| mentally ill(expression, adjective, crazy, sick, sane) | |
| not all there(expression, idiom, crazy, sick) | |
| nutty as a fruitcake(expression, idiom, crazy, sick) | |
| of unsound mind(expression, hacked, lunatic, dotty) | |
| stark raving mad(expression, idiom, crazy, sick) | |
| eccentric |
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| APA | Smart Define. (2011). crazy as a loon thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/crazy_as_a_loon/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "crazy as a loon thesaurus" https://smartdefine.org/crazy_as_a_loon/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2011, crazy as a loon thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/crazy_as_a_loon/thesaurus/synonyms>. |
| MLA | Smart Define. "crazy as a loon thesaurus" 23 May 2011. Web. 22 September 2026. <https://smartdefine.org/crazy_as_a_loon/thesaurus/synonyms> |