226 entries under solid topic. ×
| stabile(adjective, dull, firm, still) | |
| stark(adjective, strong, hard, sound, tough) | |
| substantial(adjective, strong, hard, sound, tough) | |
| taut(adjective, strong, hard, secure, rough) | |
| tense(adjective, hard, firm, stiff) | |
| thickened(adjective, set, strong, firm) | |
| unflappable(adjective, dull, firm, certain) | |
| unfluctuating(adjective, dull, strong, secure, firm) | |
| unquestionable(adjective, set, clear, total) | |
| unshaken(adjective, clear, strong, flat, firm) | |
| able(adjective, set, strong, sound, tough) | |
| able-bodied(adjective, strong, sound, tough) | |
| absolutely certain(expression, adjective, set, certain) | |
| active(adjective, strong, sound, tough) | |
| annealed(adjective, hard, firm, stiff) | |
| ardent(adjective, firm, true, stable) | |
| arthritic(adjective, hard, firm, stiff) | |
| athletic(adjective, strong, sound, tough) | |
| benumbed(verb, adjective, hard, firm) | |
| beyond doubt(expression, adjective, set, certain) |
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| APA | Smart Define. (2016). fixed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, fixed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>. |
| MLA | Smart Define. "fixed thesaurus" 16 March 2016. Web. 21 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms> |