506 entries under adjective topic. ×

12
commonsensical(calm, good, clear, sound)
12
cool(calm, good, sound, reasonable)
12
reasoning(noun, sound, reasonable, sensible)
12
balanced(calm, sound, reasonable, reason)
12
clever(smart, bright, sensible, alert)
12
level-headed(calm, sound, tough, reasonable)
11
sage(understanding, sound, reasonable, keen)
11
well-balanced(sensible, equal, stable, normal)
10
plausible(clear, sound, reasonable, sensible)
10
ratiocinative(clear, sound, reasonable, reason)
10
calm(sound, reasonable, sensible, restrained)
10
collected(calm, quiet, sound, reasonable)
10
compos mentis(expression, idiom, sound, reasonable)
10
discreet(calm, understanding, reasonable, keen)
10
of sound mind(expression, idiom, sensible, healthy)
10
together(calm, good, sound, reasonable)
9
cerebral(sound, reasonable, sensible, intelligent)
9
circumspect(sound, reasonable, moderate, proper)
9
down-to-earth(calm, hard, sound, reasonable)
9
perspicacious(understanding, sound, reasonable, keen)
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APASmart Define. (2016). rational thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rational/thesaurus/synonyms
ChicagoSmart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, rational thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rational/thesaurus/synonyms>.
MLASmart Define. "rational thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/rational/thesaurus/synonyms>