1,055 entry under adjective topic. ×
| steady(calm, strong, sound, heavy) | |
| stringent(hard, severe, firm, difficult) | |
| athletic(person, body, strong, sound) | |
| austere(strong, hard, severe, sharp) | |
| bad(good, complete, top, excellent) | |
| exhausting(dull, hard, difficult, boring) | |
| hard-hearted(mean, hard, severe, harsh) | |
| hard-line(characteristic, strong, hard, rough) | |
| healthy(strong, fit, condition, intense) | |
| indifferent(calm, mean, hard, cool) | |
| irksome(dull, difficulty, difficult, boring) | |
| mean(noun, clear, hard, cool) | |
| persistent(firm, unreasonable, grim, resolute) | |
| pitiless(hard, severe, sharp, harsh) | |
| resistant(strong, hard, fit, firm) | |
| spunky(strong, firm, lively, determined) | |
| stable(strong, sound, firm, heavy) | |
| thick-skinned(noun, mean, hard, severe) | |
| tiring(dull, difficult, boring, grim) | |
| toughened(noun, strong, hard, careless) |
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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> |