- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| silvered(dull, leaden) | |
| slaty | |
| somber(dull, gray, leaden) | |
| stiff as a board(expression, adjective, idiom, firm, solid) | |
| thorough(adjective, resolute) | |
| unbendable(adjective, firm, determined, resolute, rigid) | |
| unflexible(adjective, hard, firm, solid, stiff) | |
| unforgiving | |
| unfriendly(adjective, hostile, aloof, distant, unfeeling) | |
| unsparing(adjective, strong, hard, tough, severe) | |
| unstoppable | |
| unsupple(adjective, hard, firm, solid, stiff) | |
| acier | |
| annealed(adjective, hard, firm, solid, tense) | |
| ashy | |
| astringent(adjective, strong, hard, tough, severe) | |
| aureate | |
| authoritarian(adjective, strong, hard, tough, severe) | |
| barbarous(adjective, cold, cruel, unfeeling, unsympathetic) | |
| beefy |
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| APA | Smart Define. (2015). steely thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/steely/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "steely thesaurus" https://smartdefine.org/steely/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, steely thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/steely/thesaurus/synonyms>. |
| MLA | Smart Define. "steely thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/steely/thesaurus/synonyms> |