79 entries under reasonable topic. ×
| proven(sound, rational) | |
| rational(sound, practical, realistic, applied) | |
| solid(adjective, good, sound, right) | |
| true(sound, rational) | |
| trustworthy(good, sound, right, rational) | |
| unromantic(adjective, sensible, useful, sober) | |
| utile(adjective, strong, sensible, useful) | |
| virtual(adjective, sensible, useful, sober) | |
| workaday(adjective, sensible, regular, useful) | |
| attested(good, sound, right, rational) | |
| authentic(good, sound, right, rational) | |
| binding(sound, rational) | |
| bona fide(expression, good, sound, right) | |
| conclusive(sound, rational, influential, winning) | |
| confirmed(good, sound, right, rational) | |
| credible(good, sound, right, rational) | |
| defensible(sound, rational) | |
| determinative(sound, rational) | |
| genuine(good, sound, right, rational) | |
| in force(expression, good, sound, right) |
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| APA | Smart Define. (2015). efficient thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/efficient/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "efficient thesaurus" https://smartdefine.org/efficient/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, efficient thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/efficient/thesaurus/synonyms>. |
| MLA | Smart Define. "efficient thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/efficient/thesaurus/synonyms> |