367 entries under hard topic. ×
| impenetrable(adjective, firm, solid, stiff) | |
| stiff(adjective, strong, severe, rough) | |
| uncompromising(adjective, characteristic, mean, clear) | |
| tricky(adjective, difficult, complex) | |
| fierce(noun, adjective, clear, bad) | |
| punishing(adjective, difficult, complex) | |
| sad(adjective, bad, cool, severe) | |
| demanding(adjective, dull, easy, severe) | |
| robust(adjective, person, body, strong) | |
| stony(adjective, mean, cool, severe) | |
| callous(noun, adjective, mean, cool) | |
| stern(adjective, easy, severe, rough) | |
| stodgy(adjective, difficult, complex) | |
| adamant(adjective, mean, strong, rough) | |
| nasty(adjective, mean, bad, cool) | |
| obdurate(adjective, mean, strong, cool) | |
| ambitious(adjective, difficult, complex) | |
| involved(adjective, difficult, complex) | |
| massive(adjective, person, body, difficult) | |
| rowdy(noun, adjective, person, mean, attack) |
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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> |