51 entries under reasonable topic. ×

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potent(sound, rational)
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powerful(sound, rational)
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pure(sound, rational)
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rational(sound, logical, understandable)
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stringent(sound, rational)
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telling(sound, rational)
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ultimate(sound, rational)
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unadulterated(sound, rational)
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uncorrupted(sound, rational)
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weighty(sound, rational)
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well-grounded(sound, rational, logical, understandable)
<123>
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APASmart Define. (2015). proven thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/proven/thesaurus/synonyms
ChicagoSmart Define. 2015. "proven thesaurus" https://smartdefine.org/proven/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, proven thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/proven/thesaurus/synonyms>.
MLASmart Define. "proven thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/proven/thesaurus/synonyms>