- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
277 entries under adjective topic. ×
| courageous | |
| creaky(hard, firm, solid, stiff) | |
| ferrous(strong, hard, tough, sturdy) | |
| greyish | |
| hard-boiled(strong, hard, tough, severe) | |
| hard-core(strong, hard, tough, severe) | |
| hard-hearted(cold, cruel, stiff, unfeeling) | |
| hard as nails(expression, idiom, strong, hard) | |
| hardhearted(severe, harsh, cold, unfeeling) | |
| headstrong | |
| impliable(hard, firm, solid, stiff) | |
| indifferent(hostile, unfriendly, aloof, distant) | |
| indomitable(set, strong, hard, tough) | |
| merciless(cold, cruel, unfeeling, unsympathetic) | |
| persevering | |
| resistant(hard, firm, solid, tense) | |
| robust(strong, hard, tough, sturdy) | |
| serious(strong, hard, tough, severe) | |
| stiff as a board(expression, idiom, firm, solid) | |
| thorough |
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| APA | Smart Define. (2015). steely thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/steely/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "steely thesaurus" https://smartdefine.org/steely/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, steely thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/steely/thesaurus/synonyms>. |
| MLA | Smart Define. "steely thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/steely/thesaurus/synonyms> |