70 entries under callous topic. ×

1
barbarous(adjective, mean, hard, severe, harsh)
1
feelingless(adjective, hard, indifferent, cruel, unsympathetic)
1
fierce(adjective, mean, severe, harsh, cruel)
1
hard as nails(expression, adjective, idiom, hard, indifferent)
1
implacable(adjective, mean, hard, severe, harsh)
1
mortal(adjective, mean, severe, harsh, cruel)
1
obtuse(adjective, hard, indifferent, unfeeling, unsympathetic)
1
remorseless(adjective, mean, hard, harsh, cold)
1
savage(adjective, mean, hard, harsh, cold)
1
tactless(adjective, hard, indifferent, unsympathetic, unkind)
1
unappeasable(adjective, mean, severe, harsh, cruel)
1
unrelenting(adjective, mean, severe, harsh, cruel)
1
unsusceptible(adjective, hard, careless, indifferent, cruel)
1
unyielding(adjective, mean, severe, harsh, cruel)
0
adamant(adjective, cruel, brutal, pitiless)
0
bloodless(adjective, hard, indifferent, unkind, unresponsive)
0
crass(adjective, hard, indifferent, unkind, unresponsive)
0
feral(adjective, cruel, brutal, pitiless)
0
ferocious(adjective, cruel, brutal, pitiless)
0
hard-nosed(adjective, hard, severe, harsh, cruel)
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APASmart Define. (2016). hardhearted thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hardhearted/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardhearted thesaurus" https://smartdefine.org/hardhearted/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, hardhearted thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hardhearted/thesaurus/synonyms>.
MLASmart Define. "hardhearted thesaurus" 31 March 2016. Web. 27 September 2026. <https://smartdefine.org/hardhearted/thesaurus/synonyms>