328 entries under strong topic. ×
| fibrous(adjective, feature, characteristic, thin) | |
| muscular(adjective, person, body, sound) | |
| steely(adjective, hard, firm, serious) | |
| tenacious(adjective, firm, determined, resolute) | |
| obstinate(adjective, mean, hard, rough) | |
| hard-boiled(noun, adjective, mean, hard) | |
| ruthless(adjective, hard, severe, rough) | |
| strict(adjective, hard, easy, severe) | |
| determined(adjective, clear, hard, severe) | |
| formidable(adjective, severe, difficulty, rough) | |
| strapping(adjective, person, body, sound) | |
| heavy(noun, adjective, good, person, dull) | |
| husky(adjective, person, body, fresh) | |
| sinewy(adjective, sound, fit, thin) | |
| sound(adjective, calm, fit, firm) | |
| steadfast(adjective, calm, clear, severe) | |
| substantial(adjective, calm, hard, solid) | |
| well-built(adjective, calm, person, body) | |
| fixed(adjective, mean, hard, sound) | |
| relentless(adjective, mean, hard, severe) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |