5
severe
5
unkind(adjective, hard, cruel, unfeeling, unsympathetic)
4
barbarous(adjective, cold, cruel, unfeeling, unsympathetic)
4
cold-hearted(adjective, cold, cruel, unfeeling, unsympathetic)
4
obdurate(adjective, cold, cruel, unfeeling, unsympathetic)
4
unemotional(adjective, hard, cold, cruel, unfeeling)
4
unresponsive
4
unsparing
3
adamant
3
apathetic
3
cool
3
relentless(adjective, cold, cruel, unfeeling, unsympathetic)
3
steely(adjective, cold, cruel, unfeeling, unsympathetic)
3
tough
3
uncaring(adjective, hard, cold, cruel, unfeeling)
3
uncompassionate(adjective, cold, cruel, unfeeling, unsympathetic)
2
aloof
2
barbaric
2
beastly
2
demanding
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APASmart Define. (2013). stony-hearted thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/stony-hearted/thesaurus/synonyms
ChicagoSmart Define. 2013. "stony-hearted thesaurus" https://smartdefine.org/stony-hearted/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2013, stony-hearted thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/stony-hearted/thesaurus/synonyms>.
MLASmart Define. "stony-hearted thesaurus" 15 November 2013. Web. 27 September 2026. <https://smartdefine.org/stony-hearted/thesaurus/synonyms>