86 entries under solid topic. ×
| indurate(adjective, hard, firm, stiff) | |
| inelastic(adjective, set, hard, tough, firm) | |
| inflexible(adjective, strong, hard, tough, firm) | |
| mechanical(adjective, hard, firm, stiff) | |
| numbed(adjective, hard, firm, stiff) | |
| ossified(adjective, hard, firm, stiff) | |
| petrified(adjective, hard, firm, stiff) | |
| refractory(adjective, set, hard, tough, firm) | |
| resistant(adjective, hard, firm, stiff) | |
| rheumatic(adjective, hard, firm, stiff) | |
| squashed(adjective, dense, compressed) | |
| squeezed(adjective, dense, compressed) | |
| starched(adjective, hard, firm, stiff) | |
| stark(adjective, hard, firm, stiff) | |
| steely(adjective, strong, hard, tough, firm) | |
| stiff as a board(expression, adjective, idiom, hard, firm) | |
| stony(adjective, hard, firm, stiff) | |
| taut(adjective, close, hard, firm) | |
| unbending(adjective, strong, hard, tough, firm) | |
| unflexible(adjective, hard, firm, stiff) |
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| APA | Smart Define. (2016). thick thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/thick/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "thick thesaurus" https://smartdefine.org/thick/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, thick thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/thick/thesaurus/synonyms>. |
| MLA | Smart Define. "thick thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/thick/thesaurus/synonyms> |