80 entries under merciless topic. ×

10
depraved(adjective, adverb, characteristic, evil, nasty)
9
obdurate(adjective, mean, strong, hard, cool)
9
poignant(adjective, characteristic, hard, nasty, pain)
9
rancorous(adjective, characteristic, mean, nasty, harsh)
9
stiff(adjective, hard, severe, rough, harsh)
8
cutthroat(adjective, mean, strong, severe, harsh)
8
degenerate(adjective, characteristic, nasty, pain, violent)
8
inflexible(adjective, strong, hard, tough, severe)
8
pernicious(adjective, characteristic, mean, nasty, pain)
8
stony(adjective, mean, hard, cool, tough)
8
vengeful(adjective, characteristic, mean, severe, nasty)
7
inclement(adjective, harsh, unpleasant, vicious, painful)
7
revengeful(adjective, characteristic, mean, nasty, harsh)
7
rigid(adjective, strong, hard, tough, severe)
6
mortal(adjective, mean, severe, harsh, awful)
6
unbending(adjective, strong, hard, tough, severe)
6
uncompromising(adjective, hard, severe, rough, harsh)
4
dog-eat-dog(adjective, mean, hard, severe, harsh)
2
unstoppable(adjective, harsh, determined, fierce, persistent)
1
surly(adjective, mean, hard, tough, severe)
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APASmart Define. (2016). cruel thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/cruel/thesaurus/synonyms
ChicagoSmart Define. 2016. "cruel thesaurus" https://smartdefine.org/cruel/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, cruel thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/cruel/thesaurus/synonyms>.
MLASmart Define. "cruel thesaurus" 24 March 2016. Web. 1 October 2026. <https://smartdefine.org/cruel/thesaurus/synonyms>