143 entries under firm topic. ×

1
durable(adjective, calm, strong, secure)
1
enduring(adjective, calm, strong, secure)
1
entrenched(adjective, determined, usual, regular)
1
equable(adjective, calm, strong, secure)
1
even(adjective, calm, strong, secure)
1
fast(adjective, calm, strong, secure)
1
formal(adjective, tough, fixed, distant)
1
hard as nails(expression, adjective, idiom, tough)
1
hardboiled(adjective, determined, stiff, unfeeling)
1
hold the fort(expression, adjective, idiom, tough)
1
hold the line(expression, adjective, idiom, tough)
1
incompliant(adjective, tough, severe, difficult)
1
indurate(adjective, set, mean, hard)
1
intent(adjective, determined, usual, regular)
1
intractable(adjective, tough, fixed, distant)
1
inveterate(adjective, determined, usual, regular)
1
ironclad(adjective, cruel, determined, usual)
1
monolithic(adjective, set, solid, hardened)
1
never-failing(adjective, solid, steady, substantial)
1
petrified(adjective, set, solid, hardened)
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APASmart Define. (2015). set in stone thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/set_in_stone/thesaurus/synonyms
ChicagoSmart Define. 2015. "set in stone thesaurus" https://smartdefine.org/set_in_stone/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, set in stone thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/set_in_stone/thesaurus/synonyms>.
MLASmart Define. "set in stone thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/set_in_stone/thesaurus/synonyms>