2
flinty
2
frigid
2
hard-boiled(adjective, cold, cruel, unfeeling, unsympathetic)
2
inflexible
2
inhumane
2
remorseless(adjective, cold, cruel, unfeeling, pitiless)
2
strict
2
tyrannical
2
unforgiving
2
unmerciful
1
adamantine
1
austere
1
brutish
1
chilly
1
despotic
1
dictatorial
1
exacting
1
icy
1
impassive
1
imperturbable(adjective, cold, cruel, unfeeling, unsympathetic)
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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>