119 entries under rational topic. ×

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level-headed(adjective, sound, sensible, practical)
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original(sound, reasonable)
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persuasive(sound, reasonable)
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potent(sound, reasonable)
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powerful(sound, reasonable)
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proven(sound, reasonable, logical, understandable)
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pure(sound, reasonable)
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reliable(sound, reasonable, valid, lawful)
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secure(sound, reasonable)
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solid(sound, reasonable, logical, understandable)
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stringent(sound, reasonable)
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strong(sound, reasonable)
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substantial(sound, reasonable)
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tested(sound, reasonable)
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ultimate(sound, reasonable)
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unadulterated(sound, reasonable)
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unanswerable(sound, reasonable)
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uncorrupted(sound, reasonable)
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weighty(sound, reasonable)
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APASmart Define. (2016). justifiable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/justifiable/thesaurus/synonyms
ChicagoSmart Define. 2016. "justifiable thesaurus" https://smartdefine.org/justifiable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, justifiable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/justifiable/thesaurus/synonyms>.
MLASmart Define. "justifiable thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/justifiable/thesaurus/synonyms>