120 entries under solid topic. ×
| brick-wall(adjective, firm, steady, substantial) | |
| durable(adjective, firm, substantial, stable) | |
| imperturbable(adjective, calm, smooth, firm) | |
| intense(adjective, firm, steady, stable) | |
| levelheaded(adjective, firm, stable, fixed) | |
| liege(adjective, firm, stable, fixed) | |
| loyal(adjective, firm, stable, fixed) | |
| matter of fact(expression, idiom, correct, proper) | |
| never-failing(adjective, firm, steady, substantial) | |
| poised(adjective, firm, stable, fixed) | |
| reserved(adjective, firm, stable, fixed) | |
| safe(adjective, firm, stable, fixed) | |
| secure(adjective, firm, stable, fixed) | |
| serious-minded(adjective, firm, stable, fixed) | |
| single-minded(adjective, firm, steady, stable) | |
| staid(adjective, firm, stable, fixed) | |
| staunch(adjective, firm, steady, stable) | |
| sturdy(adjective, firm, stable, fixed) | |
| unquestioning(adjective, firm, stable, fixed) | |
| unshaken(adjective, firm, steady, stable) |
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| APA | Smart Define. (2016). regular thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/regular/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "regular thesaurus" https://smartdefine.org/regular/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, regular thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/regular/thesaurus/synonyms>. |
| MLA | Smart Define. "regular thesaurus" 23 March 2016. Web. 20 September 2026. <https://smartdefine.org/regular/thesaurus/synonyms> |