79 entries under hard topic. ×
| firm(noun, adjective, strain, rough) | |
| stiff(adjective, tough, strain, rough) | |
| unyielding(adjective, tough, strain, rough) | |
| rigid(adjective, tough, strain, firm) | |
| unmanageable(adjective, control, order, tough) | |
| unalterable(adjective, strain, rough, harsh) | |
| uncontrollable(adjective, control, order, rough) | |
| inflexible(adjective, tough, rough, firm) | |
| incompliant(adjective, tough, firm, difficult) | |
| tough(adjective, rough, firm, grim) | |
| unbending(adjective, tough, rough, firm) | |
| sturdy(adjective, tough, solid, rigid) | |
| confirmed(adjective, severe, rough, harsh) | |
| fixed(adjective, tough, rough, firm) | |
| set(adjective, tough, firm, solid) | |
| stony(adjective, firm, solid, stiff) | |
| violent(adjective, mean, rough, harsh) | |
| desperate(adjective, severe, difficulty, rough) | |
| annealed(adjective, firm, solid, tense) | |
| arbitrary(adjective, severe, rough, harsh) |
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |