176 entries under solid topic. ×
| kosher(open, proper, reliable, accepted) | |
| levelheaded(adjective, good, open, firm, honest) | |
| loyal(adjective, good, firm, sensible) | |
| made certain(expression, adjective, set, certain) | |
| mature(open, honest, sensible, reliable) | |
| muscular(adjective, strong, sound, tough) | |
| perdurable(calm, strong, steady, substantial) | |
| plausible(open, sound, reasonable, honest) | |
| powerful(adjective, strong, sound, tough) | |
| pronounced(adjective, set, certain, sure) | |
| racked(adjective, set, certain, bold) | |
| realistic(open, honest, sensible, reliable) | |
| reinforced(adjective, strong, sound, tough) | |
| sensible(adjective, good, open, firm, honest) | |
| set in stone(expression, adjective, idiom, calm, strong) | |
| sewed up(expression, adjective, set, certain) | |
| sinewy(adjective, strong, sound, tough) | |
| solid as a rock(expression, adjective, idiom, calm, strong) | |
| stabile(adjective, calm, strong, firm) | |
| stalwart(adjective, calm, strong, sound, tough) |
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| APA | Smart Define. (2015). secure thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/secure/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "secure thesaurus" https://smartdefine.org/secure/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, secure thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/secure/thesaurus/synonyms>. |
| MLA | Smart Define. "secure thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/secure/thesaurus/synonyms> |