182 entries under cruel topic. ×

4
rigid(adjective, harsh, determined, fierce)
4
sanguinary(adjective, hard, tough, harsh, violent)
4
unappeasable(adjective, mean, harsh, determined)
4
uncalled-for(adjective, mean, senseless, pitiless)
4
unmoved(adjective, cold, unfeeling, unsympathetic)
4
wild(adjective, rough, violent, vicious)
3
apathetic(adjective, person, hard, tough, severe)
3
crude(adjective, rough, violent, vicious)
3
exacting(adjective, hard, tough, severe, rough)
3
gratuitous(adjective, mean, senseless, pitiless)
3
hardened(adjective, person, hard, tough, severe)
3
punitive(adjective, severe, harsh, reactive)
3
sadistic(adjective, mean, evil, nasty, harsh)
3
thick-skinned(adjective, hard, tough, severe)
3
unflinching(adjective, mean, harsh, determined)
2
aggressive(adjective, nasty, violent, vicious)
2
dogged(adjective, appearance, harsh, terrible)
2
hurtful(adjective, mean, severe, harsh, unpleasant)
2
icy(adjective, hard, tough, severe, cold)
2
malignant(adjective, mean, vicious, hateful)
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APASmart Define. (2016). merciless thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms
ChicagoSmart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, merciless thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>.
MLASmart Define. "merciless thesaurus" 31 March 2016. Web. 1 October 2026. <https://smartdefine.org/merciless/thesaurus/synonyms>