242 entries under tough topic. ×
| persistent(adjective, strain, flat, firm) | |
| firm(noun, adjective, calm, good, set) | |
| sound(noun, adjective, calm, clear, strong) | |
| hard(adjective, person, body, strain) | |
| stable(adjective, good, strong, hard, sound) | |
| robust(adjective, person, clear, body, hard) | |
| mighty(adjective, feature, characteristic, good, person) | |
| substantial(adjective, calm, good, strong, hard) | |
| stout(adjective, calm, person, body, great) | |
| durable(adjective, calm, sound, secure) | |
| powerful(adjective, good, person, clear, body) | |
| steady(adjective, calm, good, sound, secure) | |
| steadfast(adjective, calm, good, easy) | |
| vigorous(adjective, person, great, sound) | |
| heavy(adjective, feature, characteristic, person, body) | |
| unyielding(adjective, set, hard, sound) | |
| sturdy(adjective, calm, person, body, strong) | |
| fast(adjective, calm, secure, continue) | |
| resilient(adjective, strain, determined, stiff) | |
| big(adjective, feature, characteristic, person, body) |
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| APA | Smart Define. (2016). strong thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/strong/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, strong thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>. |
| MLA | Smart Define. "strong thesaurus" 1 April 2016. Web. 26 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms> |