95 entries under strong topic. ×
| resistant(adjective, strain, firm, stiff) | |
| adamantine(adjective, hard, tough, severe) | |
| durable(adjective, strain, firm, stiff) | |
| tough(adjective, mean, hard, easy) | |
| austere(adjective, hard, tough, severe) | |
| solid(adjective, hard, complete, secure) | |
| robust(adjective, hard, tough, strain) | |
| resilient(adjective, strain, stiff, firmness) | |
| withstanding(adjective, strain, stiff, firmness) | |
| iron(adjective, mean, hard, tough) | |
| implacable(adjective, mean, hard, tough) | |
| grim(adjective, hard, tough, severe) | |
| mulish(adjective, mean, hard, tough) | |
| steely(adjective, hard, tough, firm) | |
| flinty(adjective, hard, tough, severe) | |
| stiff-necked(adjective, mean, hard, tough) | |
| hardheaded(adjective, hard, tough, determined) | |
| callous(adjective, set, mean, hard) | |
| cruel(adjective, hard, tough, severe) | |
| hard-line(adjective, hard, tough, severe) |
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| APA | Smart Define. (2015). rigid thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, rigid thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>. |
| MLA | Smart Define. "rigid thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms> |