5
callous(adjective, bad, hard, tough, severe)
5
insensible(adjective, bad, hard, tough, severe)
3
cold-blooded(adjective, bad, hard, tough, severe)
3
hard-hearted(adjective, bad, hard, tough, severe)
3
inhuman(adjective, bad, hard, tough, severe)
3
insensate(adjective, bad, hard, tough, severe)
3
insensitive(adjective, bad, hard, tough, severe)
3
senseless(adjective, bad, hard, tough, severe)
3
unfeeling(adjective, bad, cold, cruel, aloof)
3
unkind(adjective, bad, hard, tough, severe)
3
unsympathetic(adjective, bad, hard, tough, severe)
2
emotionless(adjective, bad, cold, aloof, no feelings)
2
uncaring(adjective, bad, hard, tough, severe)
1
anesthetized(adjective, hard, tough, severe, cold)
1
apathetic(adjective, hard, tough, severe, cold)
1
as cold as charity(adjective, bad, cold, aloof, no feelings)
1
asleep(adjective, hard, tough, severe, cold)
1
benumbed(adjective, hard, tough, severe, cold)
1
brutal(adjective, hard, tough, severe, cold)
1
brute(adjective, bad, cold, aloof, no feelings)
13 years ago|133 views|share |citing 
APASmart Define. (2013). iron-hearted thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/iron-hearted/thesaurus/synonyms
ChicagoSmart Define. 2013. "iron-hearted thesaurus" https://smartdefine.org/iron-hearted/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, iron-hearted thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/iron-hearted/thesaurus/synonyms>.
MLASmart Define. "iron-hearted thesaurus" 19 May 2013. Web. 21 September 2026. <https://smartdefine.org/iron-hearted/thesaurus/synonyms>