Synonyms|733Antonyms|207|Broader|5Narrower|0Related|193

50 entries under reasonable topic. ×

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credible(good, sound, right, rational)
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defensible(sound, rational)
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determinative(sound, rational)
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efficacious(good, sound, right, rational)
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efficient(good, sound, right, rational)
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genuine(good, sound, right, rational)
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good(sound, right, rational, genuine)
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in force(expression, good, sound, right)
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irrefutable(sound, rational, authoritative, unconditional)
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justifiable(sound, rational)
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kosher(good, sound, right, rational)
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lawful(good, sound, right, rational)
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legal(good, sound, right, rational)
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legit(good, sound, right, rational)
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legitimate(good, sound, right, rational)
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logical(good, sound, right, rational)
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official(good, sound, right, rational)
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original(good, sound, right, rational)
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proven(sound, rational)
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rational
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APASmart Define. (2015). stringent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stringent/thesaurus/synonyms
ChicagoSmart Define. 2015. "stringent thesaurus" https://smartdefine.org/stringent/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, stringent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stringent/thesaurus/synonyms>.
MLASmart Define. "stringent thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/stringent/thesaurus/synonyms>