506 entries under adjective topic. ×

5
deliberate(sound, reasonable, sensible, restrained)
5
fair(good, clear, sound, reasonable)
5
impartial(sound, reasonable, honest, sensible)
5
legitimate(clear, sound, reasonable, honest)
5
matter-of-fact(hard, sound, reasonable, sensible)
5
percipient(understanding, sound, keen, sharp)
5
probable(sound, reasonable, sensible, solid)
5
psychical(intellect, reasoning, intellectual, supernatural)
5
ruminative(reasonable, intelligent, thoughtful, sober)
5
shrewd(hard, sound, tough, reasonable)
5
spiritual(intellect, intellectual, supernatural, cerebral)
5
steady(calm, quiet, sound, reasonable)
5
temperate(reasonable, moderate, honest, sensible)
5
well-grounded(sound, reasonable, reason, forceful)
4
able(smart, experience, know, capable)
4
admissible(consideration, able, allowable)
4
aware(understanding, reasonable, keen, sensible)
4
consistent(clear, sound, reasonable, sensible)
4
feasible(reasonable, honest, sensible, fair)
4
hardheaded(hard, sound, reasonable, sharp)
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APASmart Define. (2016). rational thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rational/thesaurus/synonyms
ChicagoSmart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, rational thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rational/thesaurus/synonyms>.
MLASmart Define. "rational thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/rational/thesaurus/synonyms>