- Definitions|2
- Thesaurus|2.7k
- Abbreviations|0
| irresponsible(adjective, wrong, wild, strange, silly) | |
| dim-witted(adjective, foolish, stupid) | |
| dreary | |
| feeble-minded(adjective, silly, foolish, stupid, vague) | |
| fool | |
| futile(adjective, silly, ridiculous, absurd, pointless) | |
| gaga(adjective, insane, distraught, batty) | |
| kooky(weak, simple, silly, foolish, thoughtless) | |
| obtuse | |
| thickheaded | |
| puerile(adjective, characteristic, silly, foolish, stupid) | |
| wacky(adjective, weak, simple, wild, silly) | |
| soft(adjective, stupid) | |
| cockeyed(silly, foolish, fantastic, irrational, unwise) | |
| inapt | |
| balmy(adjective, silly, foolish, stupid, fantastic) | |
| buffoonish | |
| doltish(adjective, weak, simple, silly, foolish) | |
| dopey | |
| fatuitous |
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| APA | Smart Define. (2015). fatuous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fatuous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "fatuous thesaurus" https://smartdefine.org/fatuous/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, fatuous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fatuous/thesaurus/synonyms>. |
| MLA | Smart Define. "fatuous thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/fatuous/thesaurus/synonyms> |