233 entries under solid topic. ×
| physical(adjective, strong, hard, substantial) | |
| safe(adjective, calm, clear, strong, secure) | |
| steeled(verb, adjective, firm, hardened) | |
| sturdy(adjective, calm, strong, hard, tough) | |
| taut(adjective, strong, hard, firm) | |
| unfluctuating(adjective, calm, strong, secure, firm) | |
| vitrified(adjective, close, fix, firm) | |
| absolutely certain(expression, adjective, certain, sure) | |
| annealed(verb, adjective, hard, firm) | |
| ardent(adjective, firm, true, stable) | |
| arthritic(adjective, hard, firm, stiff) | |
| austere(adjective, tough, severe, firm, honest) | |
| benumbed(adjective, hard, firm, stiff) | |
| beyond doubt(expression, adjective, certain, fixed) | |
| brick-wall(adjective, calm, strong, secure, severe) | |
| brick wall(expression, adjective, calm, strong, hard) | |
| buckram(adjective, hard, firm, stiff) | |
| buttoned down(expression, adjective, strong, stable) | |
| caked(adjective, firm, heavy, deep) | |
| calm(verb, adjective, fix, strong, secure) |
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| APA | Smart Define. (2016). set thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/set/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "set thesaurus" https://smartdefine.org/set/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, set thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/set/thesaurus/synonyms>. |
| MLA | Smart Define. "set thesaurus" 1 March 2016. Web. 21 September 2026. <https://smartdefine.org/set/thesaurus/synonyms> |