- Definitions|2
- Thesaurus|3.3k
- Abbreviations|0
| thoughtless(adjective, inconsiderate, unobservant) | |
| half ass | |
| goofy | |
| heedless(adjective, happy, careless, careful, superficial) | |
| not good | |
| inconsiderate(adjective, person, kind, happy, careless) | |
| inattentive(adjective, happy, careless, superficial, flippant) | |
| rude(adjective, happy, careless, superficial, flippant) | |
| silly | |
| greedy | |
| harsh | |
| unthinking(adjective, careless) | |
| uncaring(adjective, happy, careless, superficial, flippant) | |
| atrocious | |
| careless(adjective, happy, attentive, superficial, responsible) | |
| cruel(adjective, good, kind, gentle, pain) | |
| desultory | |
| frivolous(adjective, silly, trivial) | |
| impetuous(adjective, calm, thinking) | |
| mindless(adjective, stupid, automatic) |
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| APA | Smart Define. (2016). thoughtful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/thoughtful/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "thoughtful thesaurus" https://smartdefine.org/thoughtful/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, thoughtful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/thoughtful/thesaurus/antonyms>. |
| MLA | Smart Define. "thoughtful thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/thoughtful/thesaurus/antonyms> |