- Definitions|0
- Thesaurus|1.2k
- Abbreviations|0
79 entries under adjective topic. ×
| fatuous(silly, foolish, stupid, crazy) | |
| flighty(ability, vague, unreliable, changeable) | |
| goofy(impractical, frivolous, half-baked, doomed) | |
| silly(ability, foolish, stupid, crazy) | |
| featherbrained | |
| frivolous | |
| frothy | |
| harebrained(ability, foolish, crazy, vague) | |
| witless(silly, foolish, innocent, vague) | |
| empty-headed | |
| half-baked(foolish, stupid, impulsive, unintelligent) | |
| airheaded(stupid, unstable, unreliable, changeable) | |
| bubbleheaded(unstable, unreliable, changeable, fickle) | |
| dense(dull, innocent, unfamiliar, unconscious) | |
| dizzy(slang, ability) | |
| gaga(ability, informal) | |
| giddy | |
| idiotic(silly, foolish, stupid, crazy) | |
| ignorant(impulsive, unfamiliar, impractical, unknowing) | |
| imbecilic(foolish, crazy, innocent, vague) |
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| APA | Smart Define. (2015). birdbrained thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/birdbrained/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "birdbrained thesaurus" https://smartdefine.org/birdbrained/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, birdbrained thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/birdbrained/thesaurus/synonyms>. |
| MLA | Smart Define. "birdbrained thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/birdbrained/thesaurus/synonyms> |