198 entries under hard topic. ×
| impenetrable(adjective, close, set, secure) | |
| obdurate(adjective, tough, flat, firm) | |
| savoury(noun, adjective, feature, force) | |
| seasoned(adjective, sound, tough, sharp) | |
| semivowel(noun, adjective, feature, force) | |
| sinew(noun, verb, force, effect) | |
| smacking(noun, adjective, power, strength) | |
| smelling(noun, adjective, feature, force) | |
| sonant(noun, adjective, feature, force) | |
| sonorous(adjective, clear, bright, intense) | |
| stick(noun, verb, force, effect) | |
| stony(adjective, set, firm, stiff) | |
| substantive(noun, adjective, feature, force) | |
| superior(noun, adjective, feature, force) | |
| surd(noun, adjective, feature, force) | |
| tonic(noun, adjective, feature, force) | |
| unbreakable(adjective, firm, solid, stiff) | |
| velar(noun, adjective, feature, force) | |
| winning(noun, adjective, feature, force) | |
| worthy(adjective, active, intensity, competent) |
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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> |