- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
189 entries under severe topic. ×
| stiff(adjective, hard, rough, difficult) | |
| nice(noun, adjective, feature, correct, slight) | |
| uncompromising(adjective, hard, rough, difficult) | |
| unyielding(adjective, strong, hard, tough) | |
| difficult(adjective, hard, rough, harsh) | |
| right(noun, adjective, hard, complete, correct) | |
| tough(adjective, strong, hard, rough) | |
| obdurate(adjective, strong, hard, tough) | |
| sharp(noun, adjective, correct, harsh) | |
| tight(adjective, careful, rigid, strict) | |
| bitter(adjective, strong, hard, tough) | |
| oppressive(adjective, hard, tough, rough) | |
| arduous(adjective, hard, tough, rough) | |
| inclement(adjective, hard, tough, rough) | |
| relentless(adjective, strong, hard, tough) | |
| rough(adjective, strong, hard, tough) | |
| rugged(adjective, strong, hard, tough) | |
| unbending(adjective, strong, hard, tough) | |
| brutal(adjective, hard, tough, rough) | |
| critical(adjective, harsh, precise, rigid) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 22 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |