125 entries under obstinate topic. ×
| unrelenting(adjective, mean, strong, hard, severe) | |
| intractable(adjective, hard, rough, firm, difficult) | |
| hard-line(adjective, characteristic, strong, hard, rough) | |
| resistant(adjective, strong, hard, fit, firm) | |
| spunky(adjective, strong, firm, lively, determined) | |
| hard-bitten(adjective, strong, hard, continue, rough) | |
| inexorable(adjective, mean, strong, hard, firm) | |
| set(verb, adjective, calm, strong, hard) | |
| unwavering(adjective, calm, strong, secure, firm) | |
| ferocious(adjective, rough, property) | |
| headstrong(adjective, hard, rough, firm, difficult) | |
| bullheaded(adjective, strong, hard, firm, difficult) | |
| dogged(adjective, mean, strong, hard, firm) | |
| immutable(adjective, calm, strong, rough, solid) | |
| indomitable(adjective, strong, hard, great, difficult) | |
| insistent(adjective, determined, resolute, uncompromising) | |
| narrow(adjective, rough) | |
| ruffianly(adjective, rough) | |
| unforgiving(adjective, hard, rough, harsh, cruel) | |
| vicious(adjective, hard, rough, nasty, harsh) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 30 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |