| unsaneness | |
| unsound mind | |
| absurdity(stupidity, foolishness, folly) | |
| breakdown(disorder, complex, deviation, quirk, inhibition) | |
| complex(quirk, hang-up) | |
| delirium(stupidity, foolishness, folly) | |
| delusion(stupidity, foolishness, folly) | |
| delusions(noun, disorder) | |
| deviation(disorder, complex, quirk, inhibition, hang-up) | |
| disorder(complex, deviation, quirk, inhibition, hang-up) | |
| fanaticism(stupidity, foolishness, folly) | |
| fixation(complex, quirk, hang-up) | |
| folly(stupidity, foolishness) | |
| foolhardiness(stupidity, foolishness, folly) | |
| foolishness(stupidity, folly) | |
| hang-up(complex, quirk) | |
| idiosyncrasy(complex, quirk, hang-up) | |
| inhibition(disorder, complex, deviation, quirk, hang-up) | |
| instability(disorder, complex, deviation, quirk, inhibition) | |
| megalomania |
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| APA | Smart Define. (2015). mental illness thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/mental_illness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mental illness thesaurus" https://smartdefine.org/mental_illness/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, mental illness thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/mental_illness/thesaurus/synonyms>. |
| MLA | Smart Define. "mental illness thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/mental_illness/thesaurus/synonyms> |