200 entries under solid topic. ×
| hard as nails(expression, adjective, idiom, strong, sound) | |
| healthy(adjective, sound, complete, heavy) | |
| heavy-duty(adjective, strong, sound, tough) | |
| hefty(adjective, strong, hard, big) | |
| in fine feather(expression, adjective, idiom, strong, sound) | |
| levelheaded(adjective, sound, pleasant, reasonable, moderate) | |
| located(adjective, secure, firm, steady) | |
| locked(adjective, strong, secure, steady) | |
| material(adjective, strong, hard, physical) | |
| meaningful(adjective, strong, big, important) | |
| nailed(adjective, strong, secure, firm) | |
| never-failing(adjective, strong, flat, firm) | |
| perfect(complete, clean, pure, vigorous) | |
| positive(good, strong, material, steady) | |
| proper(adjective, reasonable, fair, equal) | |
| reinforced(adjective, strong, sound, tough) | |
| reputable(adjective, proper, consistent, accepted) | |
| rightful(adjective, reasonable, fair, physical) | |
| safe and sound(expression, adjective, idiom, strong) | |
| sedate(adjective, calm, quiet, easy, firm) |
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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> |