1,055 entry under adjective topic. ×
| troubled(hard, difficult, complex) | |
| unbearable(hard, difficult, complex) | |
| convict(noun, hard, difficult, complex) | |
| dire(hard, difficult, complex) | |
| hard-hitting(hard, difficult, complex) | |
| resolute(calm, clear, strong, hard) | |
| sensitive(hard, difficult, complex) | |
| solid(calm, person, body, strong) | |
| strenuous(action, dull, strong, great) | |
| unbending(mean, clear, strong, hard) | |
| courageous(clear, strong, severe, lively) | |
| onerous(dull, hard, great, severe) | |
| stalwart(calm, person, body, strong) | |
| unfeeling(noun, calm, mean, hard) | |
| unsympathetic(mean, hard, cool, severe) | |
| vigorous(strong, sound, fit, smart) | |
| brawny(person, body, strong, vigorous) | |
| fibrous(feature, characteristic, strong, thin) | |
| muscular(person, body, strong, sound) | |
| steely(strong, hard, firm, serious) |
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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> |