- Definitions|0
- Thesaurus|147
- Abbreviations|0
| frivolous | |
| fumbler(noun, fool, incompetent, butcher, bungler) | |
| gaga | |
| giddy | |
| giddybrain | |
| giddyhead | |
| goof off(noun, expression, fool, incompetent, butcher) | |
| goofball(noun, fool, incompetent, butcher, bungler) | |
| harebrained | |
| idiot(noun, fool, incompetent, butcher) | |
| ignoramus(noun, fool, incompetent, butcher) | |
| incompetent(noun, fool, butcher, bungler, bumbler) | |
| klutz(noun, fool, incompetent, butcher) | |
| lamebrain(noun, fanatic, schizoid, dingbat, ultraist) | |
| maniac(noun, crazy, loony, lamebrain, schizoid) | |
| mismanager(noun, fool, incompetent, butcher, bungler) | |
| muddler(noun, fool, incompetent, butcher, bungler) | |
| muffer(noun, fool, incompetent, butcher, bungler) | |
| numskull(noun, fool, incompetent, butcher) | |
| rattlebrain |
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| APA | Smart Define. (2015). harebrain thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/harebrain/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "harebrain thesaurus" https://smartdefine.org/harebrain/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, harebrain thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/harebrain/thesaurus/synonyms>. |
| MLA | Smart Define. "harebrain thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/harebrain/thesaurus/synonyms> |