Synonyms|191Antonyms|103|Broader|5Narrower|8Related|203
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bullheadedness(ruthlessness, pitilessness, relentlessness)
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cold-heartedness(cruelty, coldness, viciousness, hardheartedness, ruthlessness)
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complaint(immorality, wickedness, evilness)
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condition(immorality, wickedness, evilness)
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contumacy(ruthlessness, pitilessness, relentlessness)
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cruelly
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damage(immorality, wickedness, evilness)
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depth(violence, viciousness, fierceness)
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despitefulness(noun, malice, meanness, nastiness, vindictiveness)
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destruction(immorality, wickedness, evilness)
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die-hardism(ruthlessness, pitilessness, relentlessness)
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disease(immorality, wickedness, evilness)
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disorder(immorality, wickedness, evilness)
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doggedness(ruthlessness, pitilessness, relentlessness)
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emotionlessness(coldness, hardheartedness, pitilessness)
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enmity(noun, malice, meanness, nastiness, vindictiveness)
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evil(noun, immorality, wickedness, depravity, malice)
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exigency
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extreme(violence, viciousness, fierceness)
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fastidiousness
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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>