| fou | |
| fried(crazy, mad, insane, irrational, distracted) | |
| fuming(violent, mad, vicious, fierce, unreasonable) | |
| gaga(adjective, informal, sane) | |
| hacked(adjective, violent, mad, vicious, fierce) | |
| haggard | |
| hog-wild | |
| hopping mad(expression, adjective, violent, fierce, unreasonable) | |
| hothead | |
| howling | |
| hypochondriac | |
| in the ozone(expression, adjective, crazy, hysterical, lunatic) | |
| incensed(violent, mad, vicious, fierce, unreasonable) | |
| infuriated(violent, mad, vicious, fierce, unreasonable) | |
| insane person(noun, expression, idiom, person) | |
| intoxicated | |
| irate(adjective, mad, vicious, unreasonable, angry) | |
| ireful(adjective, vicious, unreasonable, furious, hacked) | |
| kleptomaniac | |
| lamebrain(noun, mad, schizophrenic, schizoid, dingbat) |
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| APA | Smart Define. (2015). maniac thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/maniac/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "maniac thesaurus" https://smartdefine.org/maniac/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, maniac thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/maniac/thesaurus/synonyms>. |
| MLA | Smart Define. "maniac thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/maniac/thesaurus/synonyms> |