Synonyms|191Antonyms|103|Broader|5Narrower|8Related|203
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indomitability(ruthlessness, pitilessness, relentlessness)
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infirmity(immorality, wickedness, evilness)
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inflexibleness(ruthlessness, pitilessness, relentlessness)
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inhuman treatment(expression, idiom)
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injury(immorality, wickedness, evilness)
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insensitivity(cruelty, harshness, unkindness)
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insult(immorality, wickedness, evilness)
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intransigence(ruthlessness, pitilessness, relentlessness)
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intransigency(ruthlessness, pitilessness, relentlessness)
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malady(immorality, wickedness, evilness)
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malaise(immorality, wickedness, evilness)
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malevolence(noun, malice, meanness, nastiness, vindictiveness)
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maliciousness(noun, cruelty, malice, meanness, nastiness)
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malignancy(noun, malice, meanness, nastiness, vindictiveness)
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mischief(immorality, wickedness, evilness)
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misery(immorality, wickedness, evilness)
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misfortune(immorality, wickedness, evilness)
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mulishness(ruthlessness, pitilessness, relentlessness)
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obstinacy(ruthlessness, pitilessness, relentlessness)
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oppressiveness
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APASmart Define. (2015). mercilessness thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mercilessness/thesaurus/synonyms
ChicagoSmart Define. 2015. "mercilessness thesaurus" https://smartdefine.org/mercilessness/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, mercilessness thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mercilessness/thesaurus/synonyms>.
MLASmart Define. "mercilessness thesaurus" 21 December 2015. Web. 28 September 2026. <https://smartdefine.org/mercilessness/thesaurus/synonyms>