45 entries under sick topic. ×
| nut(noun, slang, informal, mad) | |
| loony(noun, slang, informal, wise) | |
| screwball(noun, slang, wise, mad person) | |
| cuckoo(noun, slang, mad, wise) | |
| kook(noun, slang, mad, wise) | |
| nutcase(noun, slang, nut, fanatic) | |
| psycho(noun, slang, mad, patient) | |
| flake(noun, slang, mad, fanatic) | |
| jerk(noun, simple, slang, fool) | |
| nutjob(noun, slang, mad person) | |
| nutter(noun, slang, mad person) | |
| basket case(noun, slang, mad person) | |
| coo-coo(noun, slang, mad person) | |
| crack-brain(noun, slang, mad person) | |
| crack-skull(noun, slang, mad person) | |
| fruit-cake(noun, slang, mad person) | |
| goo-goo(noun, slang, mad person) | |
| goof(noun, slang, mad person) | |
| jerk-off(noun, slang, mad person) | |
| knee-jerk(noun, slang, mad person) |
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| APA | Smart Define. (2016). loon thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/loon/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "loon thesaurus" https://smartdefine.org/loon/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, loon thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/loon/thesaurus/synonyms>. |
| MLA | Smart Define. "loon thesaurus" 29 February 2016. Web. 23 September 2026. <https://smartdefine.org/loon/thesaurus/synonyms> |