110 entries under indifferent topic. ×

3
obtuse(adjective, hard, aloof, unfeeling)
2
case-hardened(adjective, hard, careless, cruel)
2
unbending(adjective, mean, hard, careless)
2
unimpressionable(adjective, hard, careless, cruel)
2
unsusceptible(adjective, hard, careless, cruel)
2
blase(detached, distant, apathetic, unfeeling)
2
coldblooded(adjective, mean, hard, harsh, cold)
2
disinterested(adjective, mean, hard, cool, unpleasant)
2
dog-eat-dog(adjective, mean, hard, severe, harsh)
2
indurated(adjective, hard, cool, careless)
2
insensate(adjective, hard, tough, severe, careless)
2
inured(adjective, hard, careless, cruel)
2
listless(adjective, detached, distant, apathetic)
2
nasty(adjective, mean, bad, hard, cool)
2
nonpartisan(adjective, detached, distant, apathetic)
1
phlegmatic(adjective, cool, detached, blank)
1
torpid(adjective, hard, careless, cruel)
1
uninterested(adjective, detached, distant, apathetic)
1
unmoved(adjective, mean, hard, cool, unpleasant)
1
antipathetic(adjective, mean, hard, cool, unpleasant)
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APASmart Define. (2016). heartless thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/heartless/thesaurus/synonyms
ChicagoSmart Define. 2016. "heartless thesaurus" https://smartdefine.org/heartless/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, heartless thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/heartless/thesaurus/synonyms>.
MLASmart Define. "heartless thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/heartless/thesaurus/synonyms>