99 entries under hard topic. ×

1
impenitent(adjective, tough, harsh, cruel)
1
inanimate(adjective, tough, severe, cold)
1
insensate(adjective, tough, severe, cold)
1
insensible(adjective, mean, tough, severe)
1
intolerant(adjective, tough, harsh, cold)
1
iron-hearted(adjective, tough, severe, cold)
1
numb(adjective, tough, severe, cold)
1
sensationless(adjective, tough, severe, cold)
1
senseless(adjective, tough, severe, cold)
1
sour(adjective, tough, harsh, grim)
1
surly(adjective, mean, tough, severe)
1
unamiable(adjective, tough, severe, cold)
1
uncontrite(adjective, tough, harsh, cruel)
1
uncordial(adjective, tough, severe, cold)
1
unemotional(adjective, tough, severe, cold)
1
unregenerate(adjective, tough, harsh, cruel)
1
unremitting(adjective, tough, harsh, grim)
1
unrepenting(adjective, tough, harsh, cruel)
0
coldblooded(adjective, mean, harsh, cold)
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APASmart Define. (2016). merciless thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms
ChicagoSmart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, merciless thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>.
MLASmart Define. "merciless thesaurus" 31 March 2016. Web. 29 September 2026. <https://smartdefine.org/merciless/thesaurus/synonyms>