150 entries under indifferent topic. ×

7
mean(verb, adjective, hard, cool, tough)
7
unsusceptible(noun, adjective, hard, cruel)
6
adamant(adjective, person, mean, hard, rough)
6
nonchalant(adjective, cool, detached, blank)
6
soulless(adjective, mean, hard, harsh, cold)
6
unaffected(adjective, hard, cold, cruel)
6
unpitying(adjective, mean, hard, cool, severe)
5
icy(adjective, mean, hard, cool, tough)
5
reserved(adjective, calm, cool, restrained)
5
unyielding(adjective, mean, hard, severe, rough)
4
distant(adjective, detached, unfriendly, apathetic)
4
objective(adjective, detached, distant, apathetic)
4
oblivious(adjective, cold, senseless, unsympathetic)
4
passionless(adjective, quiet, cool, detached)
4
passive(adjective, unconcerned, uncaring, insensitive)
4
stolid(noun, adjective, dull, quiet, cool)
4
untouched(adjective, calm, mean, hard, cool)
3
careless(adjective, hard, cruel, unfeeling)
3
imperceptive(adjective, unkind, unresponsive, heartless)
3
lackadaisical(adjective, unsympathetic, inattentive, uninterested)
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APASmart Define. (2016). callous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>