121 entries under rigid topic. ×
| stiff(adjective, strong, hard, severe, rough) | |
| uncompromising(adjective, characteristic, mean, clear, hard) | |
| durable(adjective, calm, quality, strong, sound) | |
| stony(adjective, mean, hard, cool, severe) | |
| callous(noun, adjective, mean, hard, cool) | |
| stern(adjective, hard, easy, severe, rough) | |
| adamant(adjective, mean, strong, hard, rough) | |
| indestructible(adjective, firm, unyielding, steely) | |
| obdurate(adjective, mean, strong, hard, cool) | |
| rock-hard(adjective, firm, unyielding, steely) | |
| hardened(noun, adjective, characteristic, strong, hard) | |
| resolute(adjective, calm, clear, strong, hard) | |
| solid(adjective, calm, person, body, strong) | |
| unbending(adjective, mean, clear, strong, hard) | |
| onerous(adjective, dull, hard, great, severe) | |
| steely(adjective, strong, hard, firm, serious) | |
| obstinate(adjective, mean, strong, hard, rough) | |
| exacting(adjective, dull, hard, easy, severe) | |
| hard-boiled(noun, adjective, mean, strong, hard) | |
| strict(adjective, strong, hard, easy, severe) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 27 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |