115 entries under reasonable topic. ×

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philosophic(sound, sensible, reasoning, intellectual)
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pleasant(agreeable, restrained, sober, self-controlled)
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ratiocinative(sound, sensible, reasoning, intellectual)
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reasoning(sound, sensible, intellectual, mental)
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reflective(sound, sensible, reasoning, intellectual)
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regulated(pleasant, agreeable, restrained, sober)
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sagacious(sound, sensible, reasoning, intellectual)
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self-restraining(restrained, self-controlled)
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synthetic(sound, sensible, reasoning, intellectual)
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thinking(sound, sensible, reasoning, intellectual)
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unexcessive(pleasant, agreeable, restrained, sober)
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unextreme(pleasant, agreeable, restrained, sober)
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warm(pleasant, agreeable, restrained, sober)
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well-advised(sound, sensible, reasoning, intellectual)
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with all marbles(expression, adjective, idiom, calm)
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APASmart Define. (2015). collected thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/collected/thesaurus/synonyms
ChicagoSmart Define. 2015. "collected thesaurus" https://smartdefine.org/collected/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, collected thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/collected/thesaurus/synonyms>.
MLASmart Define. "collected thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/collected/thesaurus/synonyms>