4
insolent(adjective, insolent)
4
objective(adjective, indifferent, detached, distant, apathetic)
4
oblivious(adjective, cold, indifferent, senseless, unsympathetic)
4
opportunistic(sophisticated, experienced, mature, hardened, urbane)
4
out of touch
4
passionless(adjective, quiet, cool, indifferent, detached)
4
passive(adjective, indifferent, unconcerned, uncaring, insensitive)
4
relentless(adjective, mean, hard, severe, evil)
4
stolid(noun, adjective, dull, quiet, cool)
4
thoughtless
4
toughen(verb, close, set, fix, settle)
4
uncharitable(adjective, mean, hard, unsympathetic)
4
unconscious(adjective, unfeeling, senseless, numb, insensitive)
4
unfriendly(adjective, hard, evil, rough, nasty)
4
unrelenting(adjective, mean, hard, tough, severe)
4
unremorseful(adjective, impenitent)
4
unsentimental(adjective, hardened, toughened, cynical, hard-boiled)
4
untouched(adjective, calm, mean, hard, cool)
4
vicious(adjective, mean, hard, evil, rough)
3
anneal(verb, close, set, fix, settle)
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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>