1,055 entry under adjective topic. ×
| oppressive(dull, hard, severe, firm) | |
| sturdy(calm, person, quality, body) | |
| firm(calm, mean, clear, strong) | |
| flinty(strong, hard, firm, harsh) | |
| cruel(mean, strong, hard, cool) | |
| thorny(hard, difficult, complex, problematic) | |
| adamantine(strong, hard, firm, unreasonable) | |
| tight(strong, hard, difficult, complex) | |
| inflexible(characteristic, mean, strong, hard) | |
| hefty(person, dull, body, strong) | |
| rigid(characteristic, mean, strong, hard) | |
| stout(calm, person, body, strong) | |
| grievous(hard, severe, difficult, harsh) | |
| painful(bad, hard, severe, difficult) | |
| serious(bad, strong, hard, easy) | |
| unbreakable(strong, firm, solid, stiff) | |
| stringy(feature, characteristic, strong, thin) | |
| weighty(hard, difficult, heavy, complex) | |
| backbreaking(hard, difficult, heavy, complex) | |
| complex(hard, difficult) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 26 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |