- Definitions|2
- Thesaurus|675
- Abbreviations|0
63 entries under determined topic. ×
| stiff(adjective, set, firm, harsh) | |
| uncompliant(adjective, tough, firm, resist) | |
| fixed(adjective, tough, severe, resolute) | |
| incompliant(adjective, resist, resolute, persistent) | |
| obstinate(adjective, cruel, resolute, pitiless) | |
| set(adjective, severe, firm, harsh) | |
| brassbound(adjective, resist, resolute, persistent) | |
| die-hard(adjective, resist, resolute, persistent) | |
| hardheaded(adjective, strong, hard, tough, firm) | |
| pat(adjective, resolute, uncompromising, unshakeable) | |
| remorseless(adjective, resist, resolute, persistent) | |
| unbendable(adjective, resist, resolute, persistent) | |
| unforgiving(adjective, resolute, uncompromising, unshakeable) | |
| mulish(adjective, strong, hard, tough, firm) | |
| pigheaded(adjective, tough, resolute, stubborn) | |
| stiff-necked(adjective, strong, hard, tough, firm) | |
| hard-nosed(adjective, strong, hard, tough) | |
| hardened(adjective, strong, firm, stiff) | |
| headstrong(adjective, resolute, uncompromising, unshakeable) | |
| opinionated(adjective, resolute, stubborn, uncompromising) |
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| APA | Smart Define. (2015). adamantine thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/adamantine/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "adamantine thesaurus" https://smartdefine.org/adamantine/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, adamantine thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/adamantine/thesaurus/synonyms>. |
| MLA | Smart Define. "adamantine thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/adamantine/thesaurus/synonyms> |