120 entries under solid topic. ×
| rigorous(adjective, correct, right, appropriate) | |
| scientific(adjective, correct, exact, proper) | |
| scrupulous(adjective, correct, exact, proper) | |
| self-possessed(adjective, firm, stable, fixed) | |
| set in stone(expression, adjective, idiom, firm) | |
| severe(adjective, close, correct, exact) | |
| sharp(adjective, close, correct, exact) | |
| skillful(adjective, close, correct, exact) | |
| solid as a rock(expression, adjective, idiom, firm) | |
| sound(verb, adjective, correct, appropriate, firm) | |
| specific(adjective, correct, exact, proper) | |
| stabile(adjective, calm, smooth, right, flat) | |
| ultraprecise(adjective, close, correct, exact) | |
| unerring(adjective, close, correct, right) | |
| unflappable(adjective, calm, dull, smooth, firm) | |
| unmistakable(adjective, close, correct, exact) | |
| unswerving(adjective, firm, steady, stable) | |
| wholehearted(adjective, open, firm, honest) | |
| allegiant(adjective, firm, stable, fixed) | |
| ardent(adjective, firm, stable, fixed) |
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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> |