Synonyms|170Antonyms|38|Broader|1Narrower|6Related|16
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determination(firmness, rigidity, stiffness)
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die-hardism(ruthlessness, pitilessness, mercilessness)
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difficulty(discipline, harshness, strictness, sternness)
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discipline
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dispassion
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distantness(noun, coldness, unfriendliness, taciturnity)
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doggedness(ruthlessness, pitilessness, mercilessness)
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durability(firmness, rigidity, stiffness)
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endurance(firmness, rigidity, stiffness)
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establishment(firmness, rigidity, stiffness)
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fastness(firmness, rigidity, stiffness)
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ferociousness
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fierceness(noun, torture, cruelty, harshness, malice)
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firmness(noun, severity, toughness, strictness, rigidity)
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formality(noun, coldness, unfriendliness, taciturnity)
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frostiness(coldness, unfriendliness)
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hard-heartedness(noun, torture, cruelty, harshness, malice)
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hellishness
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iciness(coldness, unfriendliness)
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immobility(firmness, rigidity, stiffness)
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APASmart Define. (2015). hardheartedness thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hardheartedness/thesaurus/synonyms
ChicagoSmart Define. 2015. "hardheartedness thesaurus" https://smartdefine.org/hardheartedness/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, hardheartedness thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hardheartedness/thesaurus/synonyms>.
MLASmart Define. "hardheartedness thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/hardheartedness/thesaurus/synonyms>