- Definitions|2
- Thesaurus|1.4k
- Abbreviations|0
| disobedience(absurdity, stupidity, shenanigans) | |
| drivel(account, explanation, excuse, nonsense, rubbish) | |
| dropping the ball(expression, idiom, mistake, rudeness, lapse) | |
| dubiousness(noun, ridiculousness) | |
| dullness | |
| dumb move(noun, expression, mistake, rudeness, lapse) | |
| dumb thing to do(expression, idiom, nonsense, absurdity, stupidity) | |
| dumb trick(noun, expression, nonsense, absurdity, stupidity) | |
| elfishness | |
| emptiness of mind(expression, idiom) | |
| empty-headedness | |
| error(noun, mistake, rudeness, lapse, indiscretion) | |
| excitability(noun, mistake, rudeness, lapse, error) | |
| fallow mind | |
| faux pas(noun, expression, mistake, rudeness, lapse) | |
| feeblemindedness | |
| fiddle-faddle | |
| fiddlesticks | |
| flannel | |
| flimsiness |
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| APA | Smart Define. (2016). foolishness thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/foolishness/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "foolishness thesaurus" https://smartdefine.org/foolishness/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, foolishness thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/foolishness/thesaurus/synonyms>. |
| MLA | Smart Define. "foolishness thesaurus" 29 February 2016. Web. 22 September 2026. <https://smartdefine.org/foolishness/thesaurus/synonyms> |