0
indomitability(ruthlessness, pitilessness, relentlessness)
0
infirmity(immorality, wickedness, evilness)
0
inflexibleness(ruthlessness, pitilessness, relentlessness)
0
inhuman treatment(expression, idiom)
0
injury(immorality, wickedness, evilness)
0
insensitivity(cruelty, harshness, unkindness)
0
insult(immorality, wickedness, evilness)
0
intransigence(ruthlessness, pitilessness, relentlessness)
0
intransigency(ruthlessness, pitilessness, relentlessness)
0
malady(immorality, wickedness, evilness)
0
malaise(immorality, wickedness, evilness)
0
malevolence(noun, malice, meanness, nastiness, vindictiveness)
0
maliciousness(noun, cruelty, malice, meanness, nastiness)
0
malignancy(noun, malice, meanness, nastiness, vindictiveness)
0
mischief(immorality, wickedness, evilness)
0
misery(immorality, wickedness, evilness)
0
misfortune(immorality, wickedness, evilness)
0
mulishness(ruthlessness, pitilessness, relentlessness)
0
obstinacy(ruthlessness, pitilessness, relentlessness)
0
oppressiveness
10 years ago|3.2k views|share |citing 
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>