98 entries under firm topic. ×
| undoubtful(adjective, strong, easy, solid) | |
| unfluctuating(adjective, calm, strong, secure) | |
| unqualified(adjective, open, honest, solid) | |
| wholehearted(adjective, honest, sensible, solid) | |
| brick-wall(adjective, calm, strong, secure) | |
| in the bag(expression, adjective, idiom, clear, strong) | |
| believing(adjective, sure, positive, confident) | |
| changeless(adjective, solid, stable, fixed) | |
| immovable(adjective, solid, stable, fixed) | |
| intense(adjective, sensible, solid, steady) | |
| patterned(adjective, solid, stable, fixed) | |
| reserved(adjective, sensible, solid, steady) | |
| self-possessed(adjective, calm, sound, sensible) | |
| serene(adjective, sensible, solid, steady) | |
| serious-minded(adjective, sensible, solid, steady) | |
| single-minded(adjective, sensible, solid, steady) | |
| unquestioning(adjective, solid, stable, fixed) | |
| unshaken(adjective, solid, stable, fixed) |
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| APA | Smart Define. (2016). reliable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/reliable/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "reliable thesaurus" https://smartdefine.org/reliable/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, reliable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/reliable/thesaurus/synonyms>. |
| MLA | Smart Define. "reliable thesaurus" 3 March 2016. Web. 26 September 2026. <https://smartdefine.org/reliable/thesaurus/synonyms> |