185 entries under strong topic. ×
| adamant(adjective, secure, flat, determined) | |
| at ease(expression, calm, easy, relaxed) | |
| athletic(adjective, sound, tough, solid) | |
| big(adjective, sound, tough, solid) | |
| brick wall(expression, adjective, hard, steady) | |
| buttoned down(expression, adjective, solid, safe) | |
| candid(adjective, good, reasonable, honest) | |
| capable(adjective, sound, tough, solid) | |
| closed(adjective, calm, quiet, secure) | |
| decent(adjective, good, reasonable, fair) | |
| definite(adjective, good, easy, flat) | |
| easy(adjective, calm, quiet, soft) | |
| exact(adjective, calm, smooth, flat) | |
| forceful(adjective, sound, tough, solid) | |
| forcible(adjective, sound, tough, solid) | |
| fortified(adjective, firm, solid, true) | |
| good(consistent, trustworthy, steadfast, dependable) | |
| hard as nails(expression, adjective, idiom, sound) | |
| heavy-duty(adjective, sound, tough, solid) | |
| hefty(adjective, hard, solid, big) |
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| APA | Smart Define. (2015). stable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, stable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>. |
| MLA | Smart Define. "stable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms> |