- Definitions|0
- Thesaurus|251
- Abbreviations|0
| dull-witted | |
| eccentric(adjective, silly, foolish, crazy, zany) | |
| fanciful | |
| fatuitous | |
| fireball(zany, comical, schtick) | |
| flibbertigibbet | |
| flyaway | |
| fool-headed(laughing, zany, comical, schtick) | |
| foolheaded(laughing, zany, comical, schtick) | |
| for grins(expression, laughing, zany, comical, schtick) | |
| gelastic(laughing, zany, comical, schtick) | |
| goofus(laughing, zany, comical, schtick) | |
| goofy | |
| gormless | |
| gump(laughing, zany, comical, schtick) | |
| half-baked | |
| harebrained | |
| hasty | |
| headlong | |
| highflying |
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| APA | Smart Define. (2013). hare-brained thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hare-brained/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "hare-brained thesaurus" https://smartdefine.org/hare-brained/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2013, hare-brained thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hare-brained/thesaurus/synonyms>. |
| MLA | Smart Define. "hare-brained thesaurus" 19 May 2013. Web. 21 September 2026. <https://smartdefine.org/hare-brained/thesaurus/synonyms> |