- Definitions|1
- Thesaurus|782
- Abbreviations|0
91 entries under reasonable topic. ×
| tested(good, sound, right, rational) | |
| typical(sensible, natural, normal, valid) | |
| ultimate(sound, rational) | |
| unadulterated(good, sound, right, rational) | |
| unanswerable(good, sound, right, rational) | |
| uncorrupted(good, sound, right, rational) | |
| understandable(adjective, logical, justified, defensible) | |
| usual(sensible, natural, normal, valid) | |
| verifiable(sensible, natural, normal, valid) | |
| vindicable(justified, defensible) | |
| warrantable(justified, defensible) |
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| APA | Smart Define. (2016). well-founded thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/well-founded/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, well-founded thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>. |
| MLA | Smart Define. "well-founded thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms> |