- Definitions|2
- Thesaurus|3.3k
- Abbreviations|0
| negligent(adjective, happy, careless, superficial, flippant) | |
| remiss(adjective, happy, careless, careful, thoughtless) | |
| superficial(adjective, happy, sensible, careless, deep) | |
| tactless(adjective, careless, unthinking, tactful) | |
| uncivil(adjective, happy, careless, superficial, flippant) | |
| unthoughtful(adjective, happy, careless, safe, tactful) | |
| automatic | |
| foolish(adjective, sound, wise, nonsensical, idiotic) | |
| haphazard | |
| hasty(kind, slow) | |
| idiotic(adjective, reasonable, smart, happy, careless) | |
| impolite(adjective, happy, careless, superficial, flippant) | |
| mad | |
| mean(verb, adjective, happy, careless, superficial) | |
| random | |
| stupid(adjective, sharp, happy, careless, intelligent) | |
| unconsidered | |
| unheeding | |
| unkind(adjective, gentle, friendly) | |
| unmannerly(adjective, happy, careless, superficial, flippant) |
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| APA | Smart Define. (2016). thoughtful thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/thoughtful/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "thoughtful thesaurus" https://smartdefine.org/thoughtful/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, thoughtful thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/thoughtful/thesaurus/antonyms>. |
| MLA | Smart Define. "thoughtful thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/thoughtful/thesaurus/antonyms> |