- Definitions|2
- Thesaurus|1.4k
- Abbreviations|0
| bilge(nonsense, garbage, twaddle) | |
| blank mind | |
| blankmindedness | |
| blankness | |
| blather(account, explanation, excuse, nonsense, rubbish) | |
| bombast(drivel, garbage, baloney) | |
| bootlessness | |
| bosh | |
| bumble(noun, mistake, rudeness, lapse, error) | |
| calm of mind(expression, idiom) | |
| carelessness(noun, adjective, rudeness, indiscretion, thoughtlessness) | |
| carrying-on(noun, fun, absurdity, stupidity, mischief) | |
| clowning around(expression, absurdity, stupidity, shenanigans) | |
| crock | |
| crudeness(noun, mistake, rudeness, lapse, error) | |
| curiosity(noun, ridiculousness) | |
| devilishness | |
| devilment | |
| devilry | |
| deviltry |
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| APA | Smart Define. (2016). foolishness thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/foolishness/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "foolishness thesaurus" https://smartdefine.org/foolishness/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, foolishness thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/foolishness/thesaurus/synonyms>. |
| MLA | Smart Define. "foolishness thesaurus" 29 February 2016. Web. 23 September 2026. <https://smartdefine.org/foolishness/thesaurus/synonyms> |