- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
75 entries under demanding topic. ×
| strict(adjective, feature, strong, hard, tough) | |
| severe(adjective, strong, hard, tough, correct) | |
| precise(adjective, feature, hard, correct, right) | |
| rigid(adjective, strong, hard, tough, correct) | |
| stringent(adjective, hard, tough, severe, rough) | |
| harsh(adjective, strong, hard, tough, severe) | |
| careful(noun, adjective, feature, correct, slight) | |
| stern(adjective, hard, tough, severe, rough) | |
| hard(adjective, strong, tough, severe, rough) | |
| exacting(adjective, hard, tough, severe, fine) | |
| stiff(adjective, hard, severe, rough, difficult) | |
| uncompromising(adjective, hard, severe, rough, difficult) | |
| particular(noun, adjective, correct, fine, solid) | |
| difficult(adjective, hard, severe, rough, harsh) | |
| tough(adjective, strong, hard, severe, rough) | |
| bitter(adjective, strong, hard, tough, severe) | |
| oppressive(adjective, hard, tough, severe, rough) | |
| painstaking(adjective, harsh, rigid, honorable, reliable) | |
| arduous(adjective, hard, tough, severe, rough) | |
| inclement(adjective, hard, tough, severe, rough) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |