182 entries under firm topic. ×
| unsupple(adjective, hard, stiff, tense) | |
| wholehearted(adjective, complete, total, enthusiastic) | |
| wooden(adjective, hard, stiff, tense) | |
| ardent(adjective, enthusiastic, vigorous, stable) | |
| hard and fast(expression, adjective, idiom, stiff) | |
| hardened inflexible(expression, stiff, inflexible, unbending) | |
| indurated(adjective, set, strong, hard) | |
| patterned(adjective, substantial, stable, fixed) | |
| placed(adjective, stiff, inflexible, unbending) | |
| positioned(adjective, stiff, inflexible, unbending) | |
| reserved(adjective, stable, fixed, sturdy) | |
| rock-solid(adjective, hard, compact, dense) | |
| sedate(adjective, stable, fixed, sober) | |
| self-possessed(adjective, certain, stable, fixed) | |
| serene(adjective, stable, fixed, sturdy) | |
| serious-minded(adjective, stable, fixed, sturdy) | |
| sited(adjective, stiff, inflexible, unbending) | |
| situate(adjective, stiff, inflexible, unbending) | |
| staid(adjective, stable, fixed, sober) | |
| steady-going(adjective, substantial, stable, fixed) |
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| APA | Smart Define. (2016). solid thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/solid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "solid thesaurus" https://smartdefine.org/solid/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, solid thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/solid/thesaurus/synonyms>. |
| MLA | Smart Define. "solid thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/solid/thesaurus/synonyms> |