116 entries under tough topic. ×
| single-minded(adjective, firm, harsh, cruel) | |
| strenuous(adjective, severe, difficult, painful) | |
| trying(adjective, severe, difficult, grim) | |
| unflexible(adjective, hard, firm, rigid) | |
| Herculean(adjective, severe, difficult, painful) | |
| boorish(problematic, trying) | |
| burdensome(adjective, severe, difficult, painful) | |
| congealed(adjective, set, hard, firm) | |
| demanding(adjective, hard, severe, rough) | |
| effortful(severe, difficult, painful, problematic) | |
| fractious(adjective, problematic, trying) | |
| gelatinous(adjective, set, solid, heavy) | |
| impenetrable(adjective, set, hard, firm) | |
| incompliant(adjective, hard, severe, firm) | |
| oafish(tasteless, problematic, unsophisticated, clumsy) | |
| onerous(adjective, severe, difficult, painful) | |
| tiresome(difficult, boring, tedious, problematic) | |
| titanic(severe, painful, problematic, trying) | |
| ambitious(severe, painful, problematic, trying) | |
| backbreaker(severe, painful, problematic, trying) |
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| APA | Smart Define. (2015). stiff thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, stiff thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>. |
| MLA | Smart Define. "stiff thesaurus" 24 December 2015. Web. 28 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms> |