66 entries under sound topic. ×
| well-founded(reasonable, rational) | |
| well-grounded(reasonable, rational) | |
| actual(certain, true, definite, unquestionable) | |
| convincing(adjective, reasonable, severe, harsh) | |
| irrefutable(reasonable, certain, rational, definite) | |
| powerful(adjective, reasonable, severe, harsh) | |
| real(certain, true, definite, unquestionable) | |
| true(reasonable, certain, rational, definite) | |
| unanswerable(reasonable, certain, true, rational) | |
| accurate(reasonable, rational) | |
| attested(reasonable, rational) | |
| authentic(reasonable, rational) | |
| beyond doubt(expression, certain, true, definite) | |
| bona fide(expression, reasonable, rational) | |
| confirmed(reasonable, rational) | |
| credible(reasonable, rational) | |
| defensible(reasonable, rational) | |
| determinative(reasonable, rational) | |
| efficacious(reasonable, rational) | |
| efficient(reasonable, rational) |
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| APA | Smart Define. (2015). binding thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/binding/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "binding thesaurus" https://smartdefine.org/binding/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, binding thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/binding/thesaurus/synonyms>. |
| MLA | Smart Define. "binding thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/binding/thesaurus/synonyms> |