72 entries under firm topic. ×

25
hard(adjective, mean, cool, tough, severe)
24
callous(adjective, person, mean, hard, cool)
24
flinty(adjective, rigid, stern, unyielding)
24
tough(adjective, mean, hard, cool, severe)
19
inflexible(adjective, person, hard, solid)
16
stiff(adjective, hard, careless, indifferent)
15
rocky(adjective, harsh, coarse, irregular)
14
steely(adjective, hard, solid, hostile)
13
adamantine(adjective, stiff, rigid, stubborn)
11
hardened(adjective, person, hard, tough, severe)
11
unbending(adjective, hard, solid, careless)
10
rigid(adjective, set, hard, solid)
10
unyielding(adjective, mean, hard, harsh)
9
rocklike(adjective, stiff, rigid)
7
impenetrable(adjective, hard, stiff, unfeeling)
6
unbreakable(adjective, stiff, rigid, unyielding)
5
indestructible(adjective, rigid, unyielding, steely)
5
rock-hard(adjective, rigid, unyielding, steely)
5
solid(adjective, hard, stiff, rigid)
4
dense(adjective, set, strong, hard)
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APASmart Define. (2016). stony thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stony/thesaurus/synonyms
ChicagoSmart Define. 2016. "stony thesaurus" https://smartdefine.org/stony/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, stony thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stony/thesaurus/synonyms>.
MLASmart Define. "stony thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/stony/thesaurus/synonyms>