1
austerity
1
bestiality(noun, violence, severity, torture, cruelty)
1
brutishness(noun, violence, severity, torture, cruelty)
1
coarseness(noun, violence, severity, torture, cruelty)
1
coldheartedness
1
coldness(noun, violence, severity, torture, cruelty)
1
depravity(noun, evil, violence, immorality, severity)
1
despotism(noun, violence, severity, torture, cruelty)
1
evilness(noun, immorality, wickedness)
1
extremity
1
ferocity(noun, violence, severity, torture, cruelty)
1
fierceness(noun, violence, severity, torture, cruelty)
1
force
1
hard-heartedness(noun, violence, severity, torture, cruelty)
1
hellishness(noun, pitilessness)
1
immorality(noun, wickedness, evilness)
1
implacableness(noun, cruelty, malice, meanness, nastiness)
1
inclemency
1
inflexibility(noun, ruthlessness, pitilessness, relentlessness)
1
inhumaneness
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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>