280 entries under tough topic. ×
| operose(adjective, severe, difficulty, rough) | |
| oppressive(adjective, dull, severe, rough) | |
| trying(adjective, dull, severe, rough) | |
| taxing(adjective, severe, rough, difficult) | |
| stern(adjective, person, mean, easy) | |
| unsympathetic(adjective, person, mean, cool) | |
| solid(adjective, adverb, characteristic, person, body) | |
| callous(adjective, mean, cool, severe) | |
| adamant(adjective, mean, strong, rough) | |
| obdurate(adjective, mean, strong, cool) | |
| unfeeling(adjective, person, mean, cool) | |
| cold(adjective, person, mean, clear, cool) | |
| grave(adjective, severe, difficult, harsh) | |
| hard-nosed(adjective, mean, strong, severe) | |
| serious(adjective, strong, easy, severe) | |
| adamantine(adjective, characteristic, strong, strength) | |
| brutal(adjective, person, mean, severe) | |
| nasty(adjective, mean, cool, severe) | |
| demanding(adjective, dull, easy, severe) | |
| austere(adjective, strong, severe, rough) |
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| APA | Smart Define. (2016). hard thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hard/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, hard thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>. |
| MLA | Smart Define. "hard thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms> |