- Definitions|1
- Thesaurus|782
- Abbreviations|0
91 entries under reasonable topic. ×
| good(sound, right, rational, genuine) | |
| sound(adjective, calm, good, strong, secure) | |
| just(adjective, good, sound, right) | |
| solid(adjective, calm, good, strong, sound) | |
| valid(adjective, good, sound, right) | |
| cogent(adjective, good, sound, correct) | |
| justified(good, correct, proper, moral) | |
| rational(adjective, sound, reason, logical) | |
| legitimate(adjective, good, sound, right) | |
| sensible(adjective, reason, natural, valid) | |
| substantial(adjective, calm, good, strong, sound) | |
| tenable(adjective, justified, defensible) | |
| true(sound, rational, absolute, valid) | |
| sure(adjective, calm, strong, sensible) | |
| weighty(good, sound, right, rational) | |
| credible(good, sound, right, rational) | |
| logical(adjective, good, sound, right) | |
| proper(adjective, correct, moral, valid) | |
| trustworthy(good, sound, right, rational) | |
| authentic(good, sound, right, rational) |
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| APA | Smart Define. (2016). well-founded thesaurus. Retrieved September 26, 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 26, 2026). |
| Harvard | Smart Define 2016, well-founded thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>. |
| MLA | Smart Define. "well-founded thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms> |