238 entries under adjective topic. ×

1
hard-boiled(mean, hard, tough, harsh)
1
hard-hearted(mean, hard, tough, harsh)
1
hard as nails(expression, idiom, tough, firm)
1
hardboiled(firm, determined, stiff, unfeeling)
1
hardheaded(determined, resolute, obstinate, uncompromising)
1
harsh(mean, hard, cruel, pitiless)
1
hidebound(determined, resolute, obstinate, uncompromising)
1
hold the fort(expression, idiom, tough, firm)
1
hold the line(expression, idiom, tough, firm)
1
immutable(calm, fixed, constant, impassive)
1
imperishable(stable, constant, vast, enduring)
1
implacable(mean, hard, cruel, rigid)
1
in for the long haul(expression, idiom, stable, constant)
1
incompliant(tough, severe, firm, difficult)
1
indestructible(stable, constant, enduring, lasting)
1
indurate(set, mean, hard, firm)
1
intent(firm, determined, usual, regular)
1
intractable(tough, firm, fixed, distant)
1
invariable(calm, strong, severe, stiff)
1
inveterate(firm, determined, usual, regular)
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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>