- Definitions|1
- Thesaurus|230
- Abbreviations|0
| empty-headed(adjective, thoughtless) | |
| fatuous(adjective, thoughtless) | |
| hard-hearted | |
| heartless | |
| impolite(adjective, sharp, rude, indifferent, short) | |
| improvident | |
| irrational | |
| listless(adjective, thoughtless) | |
| primitive(adjective, thoughtless) | |
| senseless | |
| undiscerning | |
| unrefined(adjective, sharp, rude, indifferent, short) | |
| unreflecting | |
| unsympathetic | |
| vacuous(adjective, thoughtless) | |
| witless | |
| arbitrary | |
| coldhearted | |
| discourteous(adjective, sharp, rude, indifferent, short) | |
| ill-advised |
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| APA | Smart Define. (2015). unthoughtful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unthoughtful/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unthoughtful thesaurus" https://smartdefine.org/unthoughtful/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, unthoughtful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unthoughtful/thesaurus/synonyms>. |
| MLA | Smart Define. "unthoughtful thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unthoughtful/thesaurus/synonyms> |