- Definitions|1
- Thesaurus|1.1k
- Abbreviations|0
| eccentricity | |
| effrontery(noun, rudeness, assurance, nerve, indiscretion) | |
| emptiness | |
| empty-headedness | |
| error(noun, mistake, rudeness, lapse, indiscretion) | |
| excitability(noun, mistake, rudeness, lapse, error) | |
| fatuousness | |
| faux pas(noun, expression, mistake, rudeness, lapse) | |
| fool mistake(noun, expression, mistake, rudeness, lapse) | |
| foolheadedness | |
| forwardness(noun, assurance, nerve, daring, gall) | |
| foul-up(noun, mistake, rudeness, lapse, error) | |
| frivolousness | |
| gaffe(noun, mistake, rudeness, lapse, error) | |
| gall(noun, assurance, nerve, daring, carelessness) | |
| gaucherie(noun, mistake, rudeness, lapse, error) | |
| goof(noun, mistake, rudeness, lapse, error) | |
| goofiness | |
| haphazardness(noun, neglect) | |
| hardihood(noun, assurance, nerve, daring, gall) |
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| APA | Smart Define. (2015). thoughtlessness thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/thoughtlessness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "thoughtlessness thesaurus" https://smartdefine.org/thoughtlessness/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, thoughtlessness thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/thoughtlessness/thesaurus/synonyms>. |
| MLA | Smart Define. "thoughtlessness thesaurus" 23 December 2015. Web. 22 September 2026. <https://smartdefine.org/thoughtlessness/thesaurus/synonyms> |