Synonyms|48Antonyms|0|Broader|0Narrower|0Related|48
1
rigorous
1
stiff
1
stony
1
strict
0
bitter
0
bleak
0
bloodless
0
boardy
0
callous
0
chilling
0
chilly
0
clammy
0
cold
0
cool
0
critical
0
difficult
0
dispassionate
0
distant
0
dour
0
fearless
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APASmart Define. (2013). hard as stone thesaurus. Retrieved September 21, 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 21, 2026).
HarvardSmart Define 2013, hard as stone thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hard_as_stone/thesaurus/synonyms>.
MLASmart Define. "hard as stone thesaurus" 19 May 2013. Web. 21 September 2026. <https://smartdefine.org/hard_as_stone/thesaurus/synonyms>