7
coherent(adjective, clear, sound, reasonable, sensible)
7
knowing(adjective, reasonable, smart, bright, proper)
7
noetic
7
philosophical(adjective, intelligent, thoughtful, moral, logical)
7
psychological(adjective, intelligent, thoughtful, intellect, knowledgeable)
7
right(adjective, sound, reasonable, honest, sensible)
7
understanding(adjective, moderate, smart, bright, intellectual)
7
valid(sound, reasonable, sensible, proper, logical)
6
astute(adjective, understanding, hard, sound, tough)
6
bright(adjective, smart, intelligent, thoughtful, brainy)
6
conceivable(adjective, reasonable, honest, fair, acceptable)
6
just(adjective, adverb, good, sound, reasonable)
6
moderate(adjective, sound, reasonable, sensible, fair)
6
perceptive(adjective, clear, reasonable, sensible, alert)
6
pragmatic(adjective, hard, sound, tough, reasonable)
6
reflective(adjective, sound, reasonable, honest, sensible)
6
tenable(adjective, sound, reasonable, honest, sensible)
6
well-founded(adjective, sound, reasonable, reason, logical)
5
analytic(adjective, clear, sound, reasonable, reason)
5
clearheaded(adjective, sensible, sober, articulate, sane)
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APASmart Define. (2016). rational thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rational/thesaurus/synonyms
ChicagoSmart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, rational thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rational/thesaurus/synonyms>.
MLASmart Define. "rational thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/rational/thesaurus/synonyms>