Synonyms|19Antonyms|1|Broader|0Narrower|0Related|0
2
callous
1
calloused
1
cold
1
cold-blooded
1
cold of heart(expression, idiom)
1
coldblooded
1
coldhearted
1
hard
1
hard of heart(expression, idiom)
1
hardened
1
hardhearted
1
heartless
1
insensitive
1
obdurate
1
stonyhearted
1
unfeeling
1
unmerciful
1
unnatural
1
unresponsive
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APASmart Define. (2015). flinthearted thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/flinthearted/thesaurus/synonyms
ChicagoSmart Define. 2015. "flinthearted thesaurus" https://smartdefine.org/flinthearted/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, flinthearted thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/flinthearted/thesaurus/synonyms>.
MLASmart Define. "flinthearted thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/flinthearted/thesaurus/synonyms>