- Definitions|2
- Thesaurus|2k
- Abbreviations|0
| fatheaded | |
| feather-headed | |
| feebleminded(weak, simple, silly, foolish, thoughtless) | |
| flustered(adjective, careless, silly, unsteady, inconstant) | |
| fluttery | |
| fond | |
| foolheaded | |
| fuddled | |
| giddy-brained | |
| giddy-headed | |
| giddy-pated | |
| giddy-witted | |
| gulled | |
| gullible(adjective, dull, simple, slow, silly) | |
| harebrain | |
| hasty | |
| heedless(adjective, careless, silly, unsteady, inconstant) | |
| ill-advised(dull, weak, simple, silly, foolish) | |
| ill-considered(weak, simple, silly, foolish, thoughtless) | |
| impractical(impulsive, half-baked, doomed, unplanned, ill-considered) |
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| APA | Smart Define. (2016). brainless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/brainless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "brainless thesaurus" https://smartdefine.org/brainless/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, brainless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/brainless/thesaurus/synonyms>. |
| MLA | Smart Define. "brainless thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/brainless/thesaurus/synonyms> |