- Definitions|1
- Thesaurus|413
- Abbreviations|0
13 entries under rigorous topic. ×
| strict(adjective, hard, severe, rough, firm) | |
| rigid(adjective, hard, tough, severe, rough) | |
| demanding(adjective, hard, severe, rough, difficult) | |
| draconian(adjective, tough, severe, firm, harsh) | |
| exacting(adjective, hard, tough, severe, rough) | |
| hard(adjective, tough, severe, rough, firm) | |
| iron-fisted(adjective, tough, severe, firm, harsh) | |
| picky(adjective, tough, severe, firm, harsh) | |
| rough(adjective, hard, severe, difficult, harsh) | |
| set(adjective, tough, severe, firm, harsh) | |
| stern(adjective, hard, tough, severe, rough) | |
| stringent(adjective, hard, tough, severe, rough) | |
| tough(adjective, severe, firm, harsh, rigid) |
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| APA | Smart Define. (2013). unpermissive thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unpermissive/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "unpermissive thesaurus" https://smartdefine.org/unpermissive/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2013, unpermissive thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unpermissive/thesaurus/synonyms>. |
| MLA | Smart Define. "unpermissive thesaurus" 28 June 2013. Web. 26 September 2026. <https://smartdefine.org/unpermissive/thesaurus/synonyms> |