138 entries under rigid topic. ×
| starched(adjective, firm, solid, stiff) | |
| starchy(adjective, firm, solid, stiff) | |
| stiff as a board(expression, adjective, idiom, firm, solid) | |
| thickened(adjective, firm, solid, stiff) | |
| tough inflexible(expression, strong, tough, sturdy) | |
| uncompliant(adjective, firm, resolute, inflexible) | |
| unflexible(adjective, firm, solid, stiff) | |
| unpermissive(adjective, tough, severe, rough, firm) | |
| unsupple(adjective, firm, solid, stiff) | |
| unswayable(firm, resolute, inflexible, strict) | |
| unwavering | |
| wooden(adjective, firm, solid, stiff) | |
| careful(adjective, harsh, strict, thorough) | |
| close-grained(tough, solid, inflexible, unified) | |
| ferric(adjective, strong, tough, sturdy) | |
| ferrous(adjective, strong, tough, sturdy) | |
| fine-grained(tough, solid, inflexible) | |
| steel(adjective, strong, tough, sturdy) |
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| APA | Smart Define. (2016). hard thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hard/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, hard thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>. |
| MLA | Smart Define. "hard thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms> |