238 entries under adjective topic. ×
| hard-boiled(mean, hard, tough, harsh) | |
| hard-hearted(mean, hard, tough, harsh) | |
| hard as nails(expression, idiom, tough, firm) | |
| hardboiled(firm, determined, stiff, unfeeling) | |
| hardheaded(determined, resolute, obstinate, uncompromising) | |
| harsh(mean, hard, cruel, pitiless) | |
| hidebound(determined, resolute, obstinate, uncompromising) | |
| hold the fort(expression, idiom, tough, firm) | |
| hold the line(expression, idiom, tough, firm) | |
| immutable(calm, fixed, constant, impassive) | |
| imperishable(stable, constant, vast, enduring) | |
| implacable(mean, hard, cruel, rigid) | |
| in for the long haul(expression, idiom, stable, constant) | |
| incompliant(tough, severe, firm, difficult) | |
| indestructible(stable, constant, enduring, lasting) | |
| indurate(set, mean, hard, firm) | |
| intent(firm, determined, usual, regular) | |
| intractable(tough, firm, fixed, distant) | |
| invariable(calm, strong, severe, stiff) | |
| inveterate(firm, determined, usual, regular) |
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| Chicago | Smart Define. 2015. "set in stone thesaurus" https://smartdefine.org/set_in_stone/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, set in stone thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/set_in_stone/thesaurus/synonyms>. |
| MLA | Smart Define. "set in stone thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/set_in_stone/thesaurus/synonyms> |