- Definitions|2
- Thesaurus|675
- Abbreviations|0
150 entries under adjective topic. ×
| intransigent(resist, determined, resolute, obstinate) | |
| inexorable(strong, hard, tough, resist) | |
| inflexible(strong, hard, tough, firm) | |
| unrelenting(strong, hard, tough, resist) | |
| adamant(strong, hard, tough, firm) | |
| stubborn(characteristic, quality, strong, hard) | |
| unyielding(strong, hard, tough, firm) | |
| tough(strong, hard, firm, unreasonable) | |
| flinty(strong, hard, tough, firm) | |
| obdurate(strong, hard, tough, resist) | |
| rigid(strong, hard, tough, severe) | |
| uncompromising(tough, resist, determined, resolute) | |
| unbending(strong, hard, tough, resist) | |
| unbreakable(strong, tough, severe, firm) | |
| relentless(strong, hard, tough, resist) | |
| hard(strong, strength, tough, firm) | |
| impenetrable(set, tough, firm, stiff) | |
| firm(strong, hard, tough, determined) | |
| indestructible(firm, rigid, unyielding, steely) | |
| rock-hard(firm, rigid, unyielding, steely) |
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| APA | Smart Define. (2015). adamantine thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/adamantine/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "adamantine thesaurus" https://smartdefine.org/adamantine/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, adamantine thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/adamantine/thesaurus/synonyms>. |
| MLA | Smart Define. "adamantine thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/adamantine/thesaurus/synonyms> |