1,055 entry under adjective topic. ×
| steadfast(calm, clear, strong, severe) | |
| substantial(calm, strong, hard, solid) | |
| uphill(great, easy, severe, rough) | |
| violent(clear, hard, severe, rough) | |
| viscid(feature, characteristic, informal, structure) | |
| well-built(calm, person, body, strong) | |
| brutal(good, bad, hard, cool) | |
| cold(good, mean, bad, hard) | |
| fixed(mean, strong, hard, sound) | |
| heartless(mean, hard, cool, severe) | |
| merciless(hard, severe, rough, harsh) | |
| relentless(mean, strong, hard, severe) | |
| rigorous(strong, hard, severe, rough) | |
| staunch(calm, clear, strong, sound) | |
| terrible(rough, property, obstinate) | |
| unrelenting(mean, strong, hard, severe) | |
| baffling(difficult, laborious) | |
| cool(calm, mean, bad, strong) | |
| intractable(hard, rough, firm, difficult) | |
| mighty(person, body, strong, great) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 27 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |