150 entries under indifferent topic. ×

16
thick-skinned(noun, adjective, calm, mean, hard)
16
uncompassionate(adjective, person, mean, hard, cool)
16
emotionless(adjective, bad, cool, cold)
16
unresponsive(adjective, calm, person, quiet, mean)
15
unkind(adjective, mean, bad, hard, cool)
14
hardhearted(adjective, mean, hard, severe, attitude)
14
impassive(adjective, calm, hard, cool, cold)
14
unconcerned(adjective, calm, mean, hard, cool)
13
impervious(noun, adjective, calm, bad, cold)
12
dispassionate(adjective, calm, cool, cold)
12
insensate(noun, adjective, bad, hard, tough)
11
aloof(adjective, calm, mean, hard, cool)
11
dead(adjective, dull, quiet, flat, cold)
10
frigid(adjective, mean, hard, cool, harsh)
9
unmoved(adjective, calm, mean, hard, cool)
8
firm(verb, adjective, close, set, fix)
8
impassible(adjective, quiet, bad, cold)
8
obtuse(noun, adjective, hard, apathetic)
7
coldhearted(adjective, hard, cold, detached)
7
detached(adjective, unfriendly, distant, apathetic)
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APASmart Define. (2016). callous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>