42 entries under firm topic. ×

1
monolithic(adjective, set, solid, hardened)
1
petrified(adjective, set, solid, hardened)
1
poured(adjective, set, solid, hardened)
1
precast(adjective, set, solid, hardened)
1
rocklike(adjective, strong, hard, substantial)
1
set(verb, adjective, strong, hard)
1
set in stone(expression, adjective, idiom, set)
1
steeled(adjective, set, solid, hardened)
1
stiff(adjective, set, hard, solid)
1
strong(adjective, set, hard, solid)
1
unyielding(adjective, set, hard, solid)
0
adamantine(adjective, set, strong, hard)
0
callous(adjective, set, strong, hard)
0
durable(adjective, stiff, rigid)
0
indurated(adjective, set, strong, hard)
0
inflexible(adjective, set, strong, hard)
0
iron(adjective, set, strong, hard)
0
rigid(adjective, set, strong, hard)
0
rocky(adjective, set, strong, hard)
0
stony(adjective, set, strong, hard)
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APASmart Define. (2015). consolidated thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/consolidated/thesaurus/synonyms
ChicagoSmart Define. 2015. "consolidated thesaurus" https://smartdefine.org/consolidated/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, consolidated thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/consolidated/thesaurus/synonyms>.
MLASmart Define. "consolidated thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/consolidated/thesaurus/synonyms>