65 entries under solid topic. ×
| solidified(adjective, hard, tough, firm) | |
| starched(adjective, hard, firm, stiff) | |
| starchy(adjective, hard, firm, tense) | |
| stark(adjective, hard, firm, tense) | |
| steely(adjective, hard, firm, tense) | |
| stiff as a board(expression, adjective, idiom, firm) | |
| taut(adjective, hard, rough, firm, harsh) | |
| tense(adjective, hard, firm, stiff) | |
| thick(adjective, set, hard, tough, firm) | |
| thickened(adjective, hard, firm, tense) | |
| unflexible(adjective, hard, firm, tense) | |
| ungraceful(adjective, hard, firm, tense) | |
| unsupple(adjective, hard, firm, tense) | |
| wooden(adjective, hard, firm, tense) | |
| close(hard, tough, rigid, inflexible) | |
| close-grained(hard, tough, rigid, inflexible) | |
| compact(hard, rigid) | |
| compressed(hard, tough, rigid, inflexible) | |
| concentrated(hard, tough, rigid, inflexible) | |
| condensed(hard, tough, rigid, inflexible) |
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |