200 entries under solid topic. ×
| self-possessed(adjective, calm, sound, firm) | |
| serious(adjective, strong, big, important) | |
| significant(proper, large, accepted, established) | |
| sincere(adjective, good, strong, honest) | |
| situated(adjective, secure, firm, steady) | |
| solid as a rock(expression, adjective, idiom, strong, firm) | |
| stark(adjective, strong, sound, tough) | |
| strapping(adjective, strong, sound, tough) | |
| tried-and-true(adjective, good, strong, honest) | |
| unblemished(complete, clean, pure, vigorous) | |
| undamaged(adjective, complete, clean, perfect) | |
| undecayed(complete, clean, pure, vigorous) | |
| unhurt(complete, clean, pure, vigorous) | |
| unimpaired(complete, clean, pure, vigorous) | |
| unmoving(adjective, calm, quiet, strong, secure) | |
| unqualified(adjective, strong, flat, firm) | |
| unshaken(adjective, strong, flat, firm) | |
| weighty(adjective, strong, firm, important) | |
| well(adjective, sound, complete, vigorous) | |
| whole(complete, clean, pure, vigorous) |
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| APA | Smart Define. (2015). stable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, stable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>. |
| MLA | Smart Define. "stable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms> |