5
common-sense(adjective, reasonable)
5
commonsense(adjective, hard, sound, reasonable, sensible)
5
deliberate(adjective, sound, reasonable, sensible, restrained)
5
fair(adjective, good, clear, sound, reasonable)
5
impartial(adjective, sound, reasonable, honest, sensible)
5
legitimate(adjective, clear, sound, reasonable, honest)
5
matter-of-fact(adjective, hard, sound, reasonable, sensible)
5
percipient(adjective, understanding, sound, keen, sharp)
5
probable(adjective, sound, reasonable, sensible, solid)
5
psychical(adjective, intellect, reasoning, intellectual, supernatural)
5
ruminative(adjective, reasonable, intelligent, thoughtful, sober)
5
shrewd(adjective, hard, sound, tough, reasonable)
5
solid(sound, reasonable, useful, realistic, forceful)
5
spiritual(adjective, intellect, intellectual, supernatural, cerebral)
5
steady(adjective, calm, quiet, sound, reasonable)
5
temperate(adjective, reasonable, moderate, honest, sensible)
5
well-grounded(adjective, sound, reasonable, reason, forceful)
4
able(adjective, smart, experience, know, capable)
4
admissible(adjective, consideration, able, allowable)
4
aware(adjective, understanding, reasonable, keen, sensible)
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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>