604 entries under adjective topic. ×

3
compassionless(mean, hard, severe, attitude)
3
dead-hearted(bad, cold, aloof, no feelings)
3
dead-pan(bad, cold, aloof, no feelings)
3
defiant(insolent, impenitent, unrepentant)
3
derisive
3
disrespectful
3
fierce(mean, hard, severe, evil)
3
flagrant
3
hard-bitten(hard, rough, harsh, cruel)
3
imperceptive(indifferent, unkind, unresponsive, heartless)
3
imperturbable(calm, cool, cold, cruel)
3
implacable(mean, hard, severe, evil)
3
indurated(hard, cool, firm, cruel)
3
irresponsive(bad, cold, aloof, no feelings)
3
lackadaisical(indifferent, unsympathetic, inattentive, uninterested)
3
lukewarm(calm, mean, hard, cool)
3
marble-hearted(bad, cold, aloof, no feelings)
3
mouthy
3
narcotic
3
phlegmatic(cool, indifferent, detached, unfriendly)
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APASmart Define. (2016). callous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>