- Definitions|1
- Thesaurus|367
- Abbreviations|0
| spiritlessness(noun, hopelessness) | |
| spite(noun, violence, torture, cruelty, harshness) | |
| straight face | |
| stupor | |
| torpor | |
| torture(noun, violence, severity, cruelty, coarseness) | |
| truculency(noun, violence, severity, torture, cruelty) | |
| unfeeling | |
| unfeelingness(noun, violence, severity, torture, cruelty) | |
| venom(noun, violence, torture, cruelty, spite) | |
| vindictiveness(noun, spite, malice, unkindness, nastiness) | |
| wickedness(noun, violence, severity, torture, cruelty) | |
| withdrawal | |
| abjection(noun, cruelty, unkindness, spitefulness, callousness) | |
| adamancy(ruthlessness, pitilessness, mercilessness, relentlessness) | |
| atrociousness(cruelty, viciousness) | |
| baseness(noun, cruelty, unkindness, spitefulness, callousness) | |
| beastliness(noun, cruelty, unkindness, spitefulness, callousness) | |
| boldness | |
| bravery |
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| APA | Smart Define. (2015). heartlessness thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/heartlessness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "heartlessness thesaurus" https://smartdefine.org/heartlessness/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, heartlessness thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/heartlessness/thesaurus/synonyms>. |
| MLA | Smart Define. "heartlessness thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/heartlessness/thesaurus/synonyms> |