6
merciless(adjective, mean, hard, cruel, unfeeling)
4
callous(adjective, mean, hard, severe, attitude)
4
cold-blooded(adjective, hard, attitude, cruel, unfeeling)
4
hard(adjective, mean, severe, attitude, harsh)
4
heartless(adjective, mean, hard, severe, attitude)
4
unfeeling(adjective, mean, hard, severe, attitude)
3
cold-hearted(adjective, hard, attitude, cruel, unfeeling)
3
hard-boiled(adjective, hard, attitude, unfeeling, unsympathetic)
3
hardhearted(adjective, mean, hard, severe, attitude)
3
obdurate(adjective, hard, attitude, cruel, unfeeling)
3
pitiless(adjective, mean, hard, severe, harsh)
3
ruthless(adjective, mean, hard, severe, harsh)
2
coldhearted(adjective, unmoved)
2
hardened(adjective, hard, attitude, cruel, unfeeling)
2
inhuman(adjective, hard, cruel, unfeeling, unsympathetic)
2
insensitive(adjective, hard, cruel, unfeeling, unsympathetic)
2
remorseless
2
stony(adjective, unyielding)
2
stonyhearted(adjective, attitude)
2
unemotional(adjective, hard, unfeeling, unsympathetic, pitiless)
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APASmart Define. (2014). compassionless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/compassionless/thesaurus/synonyms
ChicagoSmart Define. 2014. "compassionless thesaurus" https://smartdefine.org/compassionless/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2014, compassionless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/compassionless/thesaurus/synonyms>.
MLASmart Define. "compassionless thesaurus" 1 April 2014. Web. 20 September 2026. <https://smartdefine.org/compassionless/thesaurus/synonyms>