94 entries under tough topic. ×
| burly(adjective, strong, fit, firm) | |
| condensed(adjective, set, hard, heavy) | |
| hardy(adjective, person, body, strong, sound) | |
| inflexible(adjective, strong, hard, secure, smooth) | |
| forceful(adjective, clear, strong, sound) | |
| healthy(adjective, strong, hard, sound, complete) | |
| mighty(adjective, person, body, strong, sound) | |
| muscular(adjective, person, body, strong, sound) | |
| solidified(adjective, set, hard, firm) | |
| unshakable(adjective, strong, hard, secure) | |
| well-made(adjective, strong, cool, great, sound) | |
| brawny(adjective, person, body, strong) | |
| jelled(adjective, set, hard, firm) | |
| persistent(adjective, strong, firm, certain) | |
| resistant(adjective, strong, hard, fit) | |
| unbreakable(adjective, strong, hard, severe) | |
| big(adjective, person, body, strong, sound) | |
| congealed(adjective, set, hard, firm) | |
| hale(adjective, strong, sound, complete) | |
| impermeable(adjective, close, set, hard) |
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| APA | Smart Define. (2016). solid thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/solid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "solid thesaurus" https://smartdefine.org/solid/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, solid thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/solid/thesaurus/synonyms>. |
| MLA | Smart Define. "solid thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/solid/thesaurus/synonyms> |