198 entries under hard topic. ×
| mulish(adjective, tough, firm, determined) | |
| physical(adjective, fit, substantial, sturdy) | |
| pliable(adjective, tough, flexible, hardy) | |
| relentless(adjective, tough, severe, firm) | |
| resonant(adjective, clear, intense, big) | |
| rocklike(adjective, firm, substantial, stiff) | |
| rooted(adjective, secure, solid, steady) | |
| steel(adjective, tough, sturdy, rigid) | |
| steeled(adjective, set, firm, solid) | |
| supple(adjective, weak, tough, soft) | |
| volatile(adjective, weak, tough, soft) | |
| arm(noun, verb, force, effect) | |
| delicacy(noun, active, intensity) | |
| tough inflexible(expression, tough, sturdy, rigid) | |
| wrinkled(adjective, energetic, which, greatness) | |
| airy(adjective, tough, flexible, hardy) | |
| astringent(adjective, tough, severe, sharp) | |
| bouncy(adjective, tough, active, animated) | |
| by the book(expression, adjective, idiom, tough) | |
| callous(adjective, set, firm, stiff) |
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| APA | Smart Define. (2016). strong thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/strong/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, strong thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>. |
| MLA | Smart Define. "strong thesaurus" 1 April 2016. Web. 25 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms> |