187 entries under hard topic. ×
| condensed(adjective, set, tough, solid) | |
| forbidding(adjective, cool, severe, harsh) | |
| frozen(adjective, firm, uncertain, anxious) | |
| impervious(adjective, set, tough, solid) | |
| impliable(adjective, firm, dead, rigid) | |
| jelled(adjective, set, tough, firm) | |
| mechanical(adjective, firm, rigid, inflexible) | |
| unflexible(adjective, tough, firm, rigid) | |
| careless(adjective, indifferent, cruel, apathetic) | |
| cohesive(adjective, strong, solid, sturdy) | |
| congealed(adjective, set, tough, firm) | |
| definite(adjective, clear, cool, pleasant) | |
| demanding(adjective, tough, severe, rough) | |
| fierce(adjective, rough, harsh, cruel) | |
| hard-bitten(adjective, strong, rough, harsh) | |
| hardy(adjective, set, strong, pleasant) | |
| impassive(adjective, dull, careless, indifferent) | |
| impenetrable(adjective, set, tough, firm) | |
| incompliant(adjective, tough, severe, firm) | |
| indurate(adjective, set, strong, firm) |
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| APA | Smart Define. (2015). stiff thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, stiff thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>. |
| MLA | Smart Define. "stiff thesaurus" 24 December 2015. Web. 25 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms> |