62 entries under slang topic. ×
| nutty(noun, adjective, light, weak, simple) | |
| nuts(noun, adjective, wild, strange) | |
| batty(noun, adjective, light, wild) | |
| wacky(adjective, light, weak, simple, wrong) | |
| cuckoo(noun, adjective, wild, silly) | |
| balmy(adjective, knowledge, ability, wild) | |
| screwy(adjective, light, wild, silly) | |
| kook(noun, person, sick, wise) | |
| psycho(noun, adjective, person, crazy) | |
| screwball(noun, adjective, wild, silly) | |
| mental(noun, adjective, informal, foolish) | |
| nut(noun, crazy, sick, wise) | |
| loco(noun, adjective, insane, sane) | |
| bananas(adjective, crazy, mad, sane) | |
| dippy(adjective, light, knowledge, ability) | |
| weirdo(noun, wise) | |
| buggy(adjective, silly, foolish, crazy) | |
| fruity(adjective, silly, foolish, insane) | |
| sappy(adjective, knowledge, ability, foolish) | |
| loon(noun, informal, sick, wise) |
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| APA | Smart Define. (2015). loony thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/loony/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "loony thesaurus" https://smartdefine.org/loony/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, loony thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/loony/thesaurus/synonyms>. |
| MLA | Smart Define. "loony thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/loony/thesaurus/synonyms> |