89 entries under tough topic. ×

8
stony(adjective, mean, hard, severe)
8
uncaring(adjective, person, mean, bad, hard)
8
unyielding(adjective, mean, hard, harsh)
7
insensible(adjective, bad, hard, severe)
6
apathetic(adjective, hard, severe, cold)
6
firm(adjective, mean, hard, stubborn)
6
hardened(adjective, hard, severe, harsh)
6
inhumane(adjective, mean, hard, evil)
6
mean(adjective, hard, nasty, harsh)
6
thick-skinned(adjective, calm, mean, hard)
6
uncompassionate(adjective, mean, hard, severe)
6
unemotional(adjective, mean, hard, severe)
5
barbarous(adjective, mean, hard, evil)
5
inexorable(adjective, mean, hard, evil)
5
relentless(adjective, mean, hard, evil)
4
adamant(adjective, mean, hard, harsh)
4
icy(adjective, person, hard, severe)
4
insensate(adjective, bad, hard, severe)
4
tyrannical(adjective, hard, evil, nasty)
4
unforgiving(adjective, mean, hard, harsh)
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APASmart Define. (2016). hard-hearted thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hard-hearted/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-hearted thesaurus" https://smartdefine.org/hard-hearted/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, hard-hearted thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hard-hearted/thesaurus/synonyms>.
MLASmart Define. "hard-hearted thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/hard-hearted/thesaurus/synonyms>