155 entries under harsh topic. ×

6
violent(adjective, hard, rough, nasty)
5
adamant(adjective, person, mean, hard, rough)
5
demoniac(adjective, evil, nasty, violent)
5
fell(adjective, violent, cruel, vicious)
5
flinty(adjective, evil, nasty, vicious)
5
hard-boiled(adjective, person, hard, severe, rough)
5
hellish(adjective, evil, nasty, violent)
5
intractable(adjective, appearance, hard, severe, rough)
5
stiff(adjective, hard, rough, cruel)
5
uncaring(adjective, person, mean, hard, tough)
4
coldhearted(adjective, mean, hard, severe)
4
rigid(adjective, cruel, determined, fierce)
4
sanguinary(adjective, hard, tough, violent)
4
unappeasable(adjective, mean, cruel, determined)
3
evil(adjective, nasty, corrupt, vicious)
3
exacting(adjective, hard, tough, severe, rough)
3
hardened(adjective, person, hard, tough, severe)
3
punitive(adjective, severe, cruel, reactive)
3
sadistic(adjective, mean, evil, nasty)
3
unflinching(adjective, mean, cruel, determined)
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APASmart Define. (2016). merciless thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms
ChicagoSmart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, merciless thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>.
MLASmart Define. "merciless thesaurus" 31 March 2016. Web. 30 September 2026. <https://smartdefine.org/merciless/thesaurus/synonyms>