81 entries under stiff topic. ×
| resistant(adjective, hard, firm, solid) | |
| rheumatic(adjective, hard, firm, solid) | |
| rocklike(adjective, strong, hard, firm, substantial) | |
| secure(adjective, close, strong, hard, firm) | |
| snug(adjective, close, strong, open, easy) | |
| stable(adjective, close, strong, hard, firm) | |
| starched(adjective, hard, firm, solid) | |
| stark(adjective, hard, firm, solid) | |
| steely(adjective, strong, hard, tough, firm) | |
| stiff as a board(expression, adjective, idiom, hard, firm) | |
| stony(adjective, hard, firm, solid) | |
| taut(adjective, close, hard, firm, solid) | |
| unbending(adjective, strong, hard, tough, firm) | |
| unflexible(adjective, hard, firm, solid) | |
| unsupple(adjective, hard, firm, solid) | |
| vitrified(adjective, dense, syrupy, concentrated) | |
| callous(adjective, firm, rigid) | |
| durable(adjective, firm, rigid) | |
| indurated(adjective, firm, rigid) | |
| rocky(adjective, firm, rigid) |
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| APA | Smart Define. (2016). thick thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/thick/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "thick thesaurus" https://smartdefine.org/thick/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, thick thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/thick/thesaurus/synonyms>. |
| MLA | Smart Define. "thick thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/thick/thesaurus/synonyms> |