- Definitions|1
- Thesaurus|231
- Abbreviations|0
| asperity(noun, harshness, sternness) | |
| assurance(firmness, rigidity, stiffness) | |
| backbone(firmness, rigidity, stiffness) | |
| balance(firmness, rigidity, stiffness) | |
| bestiality(noun, torture, cruelty, harshness, malice) | |
| bluntness | |
| boldness | |
| brazenness | |
| brutishness(noun, torture, cruelty, harshness, malice) | |
| bullheadedness(ruthlessness, pitilessness, mercilessness) | |
| coarseness(noun, torture, cruelty, harshness, malice) | |
| cohesion(firmness, rigidity, stiffness) | |
| cold-heartedness(noun, cruelty, insensitivity, coldness, unfriendliness) | |
| constancy(firmness, rigidity, stiffness) | |
| contumacy(ruthlessness, pitilessness, mercilessness) | |
| danger(noun, severity, harshness) | |
| dependability(firmness, rigidity, stiffness) | |
| depravity(noun, torture, cruelty, harshness, malice) | |
| despotism(noun, torture, cruelty, harshness, malice) | |
| detachment |
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| APA | Smart Define. (2015). hardheartedness thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/hardheartedness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hardheartedness thesaurus" https://smartdefine.org/hardheartedness/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, hardheartedness thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/hardheartedness/thesaurus/synonyms>. |
| MLA | Smart Define. "hardheartedness thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/hardheartedness/thesaurus/synonyms> |