- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
171 entries under tough topic. ×
| savage(adjective, hard, harsh, unpleasant) | |
| square(adjective, severe, firm, harsh) | |
| stiff-necked(adjective, strong, hard, severe) | |
| thick(adjective, strong, hard, sturdy) | |
| troublesome(adjective, hard, severe, rough) | |
| unfeeling(adjective, severe, harsh, cruel) | |
| unkind(adjective, harsh, grim, painful) | |
| unsympathetic(adjective, severe, harsh, grim) | |
| avaricious(adjective, hard, harsh, cruel) | |
| backbreaking(adjective, hard, severe, rough) | |
| barbarous(adjective, hard, harsh, cruel) | |
| bloody(adjective, hard, harsh, cruel) | |
| bullheaded(adjective, strong, hard, severe) | |
| by the book(expression, adjective, idiom, strong, hard) | |
| callous(adjective, hard, harsh, grim) | |
| complicated(adjective, rough, difficult, heavy) | |
| dead set(expression, adjective, severe, firm) | |
| disagreeable(adjective, severe, harsh, unpleasant) | |
| disciplinary(adjective, strong, hard, severe) | |
| distressing(adjective, severe, rough, difficult) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |