Synonyms|48Antonyms|0|Broader|0Narrower|0Related|48
0
steely
0
stern
0
tough
0
unaffected
0
unfeeling
0
unfounded
0
unfriendly
0
unopened
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APASmart Define. (2013). hard as stone thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hard_as_stone/thesaurus/synonyms
ChicagoSmart Define. 2013. "hard as stone thesaurus" https://smartdefine.org/hard_as_stone/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2013, hard as stone thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hard_as_stone/thesaurus/synonyms>.
MLASmart Define. "hard as stone thesaurus" 19 May 2013. Web. 27 September 2026. <https://smartdefine.org/hard_as_stone/thesaurus/synonyms>