65 entries under solid topic. ×
| chilled(adjective, hard, firm, tense) | |
| concrete(hard, tough, rigid, inflexible) | |
| congealed(adjective, hard, tough, firm) | |
| contracted(adjective, hard, firm, tense) | |
| creaky(adjective, hard, firm, tense) | |
| frozen(adjective, hard, firm, tense) | |
| graceless(adjective, hard, firm, tense) | |
| hardened(adjective, hard, tough, firm) | |
| heavy(hard, tough, rigid, inflexible) | |
| immalleable(adjective, hard, firm, stiff) | |
| impervious(hard, tough, rigid, inflexible) | |
| impliable(adjective, hard, firm, stiff) | |
| indurate(adjective, hard, firm, tense) | |
| inelastic(adjective, hard, tough, firm) | |
| jelled(adjective, hard, tough, firm) | |
| mechanical(adjective, hard, firm, tense) | |
| numbed(adjective, hard, firm, tense) | |
| ossified(adjective, hard, firm, tense) | |
| petrified(adjective, hard, firm, tense) | |
| rheumatic(adjective, hard, firm, tense) |
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Refractory on
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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> |