- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
171 entries under tough topic. ×
| ironfisted(rigid, scrupulous) | |
| no-nonsense(adjective, severe, firm, harsh) | |
| perverse(adjective, severe, harsh, grim) | |
| resentful(adjective, severe, harsh, grim) | |
| robust(adjective, strong, hard, complete) | |
| steel(adjective, strong, hard, sturdy) | |
| sturdy(adjective, strong, hard, complete) | |
| thick-skinned(adjective, harsh, grim, painful) | |
| tough inflexible(expression, strong, hard, sturdy) | |
| unjust(adjective, severe, harsh, grim) | |
| wearisome(adjective, rough, difficult, heavy) |
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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> |