87 entries under indifferent topic. ×

6
insensible(adjective, bad, strong, hard, tough)
6
unresponsive(adjective, calm, person, bad, hard)
5
aloof(adjective, calm, hard, restrained)
5
cool(adjective, calm, restrained, detached)
5
hard-bitten(adjective, hard, tough, rough, harsh)
5
unconcerned(adjective, calm, hard, careless)
4
chilly(adjective, person, feelings, detached)
4
detached(adjective, distant, unfeeling, remote)
4
insensate(noun, adjective, bad, hard, careless)
4
inured(noun, adjective, hard, careless)
4
unbending(adjective, mean, strong, hard, tough)
4
uncaring(adjective, bad, hard, careless, cold)
4
unkind(adjective, bad, hard, tough, severe)
3
insentient(adjective, bad, hard, careless, cold)
2
brutish(adjective, hard, cold, unfeeling)
2
cold fish(expression, adjective, calm, mean, hard)
2
soulless(adjective, hard, careless, cruel)
2
stubborn(adjective, mean, strong, hard, tough)
2
toughened(noun, adjective, hard, careless)
1
above(adjective, detached, distant, remote)
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APASmart Define. (2016). hard-boiled thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard-boiled/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-boiled thesaurus" https://smartdefine.org/hard-boiled/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, hard-boiled thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard-boiled/thesaurus/synonyms>.
MLASmart Define. "hard-boiled thesaurus" 23 March 2016. Web. 28 September 2026. <https://smartdefine.org/hard-boiled/thesaurus/synonyms>