3
antihumanitarian(adjective, aroused negative, aroused bad feelings)
3
arrogant(adjective, insolent)
3
as cold as charity(adjective, bad, cold, aloof, no feelings)
3
audacious(adjective, insolent)
3
benumbed(adjective, hard, tough, severe, cruel)
3
brittle(adjective, aroused negative, aroused bad feelings)
3
brutalize(verb, dull, develop, rough, adjust)
3
calcify(verb, close, set, fix, settle)
3
careless(adjective, hard, indifferent, cruel, unfeeling)
3
cheeky(adjective, insolent)
3
compassionless(adjective, mean, hard, severe, attitude)
3
dead-hearted(adjective, bad, cold, aloof, no feelings)
3
dead-pan(adjective, bad, cold, aloof, no feelings)
3
defiant(adjective, insolent, impenitent, unrepentant)
3
derisive(adjective, insolent)
3
disrespectful(adjective, insolent)
3
fierce(adjective, mean, hard, severe, evil)
3
flagrant(adjective, insolent)
3
fossilize(verb, close, set, fix, settle)
3
hard-bitten(adjective, hard, rough, harsh, cruel)
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APASmart Define. (2016). callous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>