70 entries under callous topic. ×

8
hardened(adjective, hard, attitude, careless, cold)
8
indifferent(adjective, mean, hard, harsh, careless)
8
malevolent(adjective, person, cruel, brutal, pitiless)
8
mean(adjective, person, severe, harsh, cruel)
7
coldhearted(adjective, person, mean, hard, harsh)
6
stern(adjective, person, severe, harsh, cruel)
6
tough(adjective, hard, severe, careless, indifferent)
6
vindictive(adjective, person, cruel, brutal, pitiless)
4
cutthroat(adjective, mean, hard, severe, harsh)
4
dog-eat-dog(adjective, mean, hard, severe, harsh)
4
unforgiving(adjective, mean, hard, severe, harsh)
4
unresponsive(adjective, hard, careless, indifferent, cruel)
3
inhuman(adjective, mean, hard, harsh, cold)
3
thick-skinned(adjective, hard, careless, indifferent, cruel)
3
unconcerned(adjective, hard, careless, indifferent, cruel)
2
hard-hearted(adjective, cold, cruel, unfeeling, unsympathetic)
2
harsh(adjective, mean, hard, severe, cold)
2
inexorable(adjective, mean, hard, severe, harsh)
2
relentless(adjective, mean, hard, severe, harsh)
2
severe(adjective, mean, harsh, cruel, unsympathetic)
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APASmart Define. (2016). hardhearted thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hardhearted/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardhearted thesaurus" https://smartdefine.org/hardhearted/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, hardhearted thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hardhearted/thesaurus/synonyms>.
MLASmart Define. "hardhearted thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/hardhearted/thesaurus/synonyms>