200 entries under solid topic. ×
| concrete(adjective, strong, hard, physical) | |
| energetic(adjective, strong, sound, tough) | |
| fastened(adjective, strong, secure, firm) | |
| mighty(adjective, strong, sound, tough) | |
| muscular(adjective, strong, sound, tough) | |
| serene(adjective, calm, quiet, smooth, soft) | |
| sinewy(adjective, strong, sound, tough) | |
| single-minded(adjective, firm, fixed, resolute) | |
| steady-going(adjective, continue, firm, steady) | |
| true-blue(adjective, good, strong, honest) | |
| well-constructed(complete, vigorous, sturdy) | |
| well-made(adjective, strong, sound, tough) | |
| bound(adjective, close, strong, flat, firm) | |
| careful(good, strong, steady, consistent) | |
| heavy(adjective, strong, hard, sound, tough) | |
| honest(adjective, strong, reasonable, fair) | |
| iron(adjective, strong, safe, sheltered) | |
| physical(adjective, strong, hard, material) | |
| right(adjective, direct, sound, complete, smooth) | |
| rooted(adjective, strong, hard, secure) |
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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> |