83 entries under reasonable topic. ×

1
analytical(sound, sensible, reasoning, intellectual)
1
astute(adjective, sound, sharp, smart)
1
attentive(adjective, rational, intelligent, sober)
1
au courant(expression, adjective, rational, intelligent)
1
aware(adjective, sound, sensible, rational)
1
calm(adjective, sound, sensible, rational)
1
canny(adjective, keen, sharp, smart)
1
cerebral(adjective, sound, sensible, rational)
1
circumspect(sound, sensible, reasoning, intellectual)
1
cognitive(adjective, sound, sensible, rational)
1
cognizant(adjective, sound, sensible, rational)
1
collected(calm, sound, sensible, intellectual)
1
composed(calm, sound, sensible, stable)
1
conscious(adjective, sound, sensible, rational)
1
consequent(adjective, good, sound, sensible)
1
conversant(adjective, sympathetic, rational, intelligent)
1
coolheaded(calm, sound, sensible, rational)
1
deductive(sound, sensible, reasoning, intellectual)
1
deliberate(sound, sensible, reasoning, intellectual)
1
dependable(calm, sound, sensible, proper)
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APASmart Define. (2015). all there thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/all_there/thesaurus/synonyms
ChicagoSmart Define. 2015. "all there thesaurus" https://smartdefine.org/all_there/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, all there thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/all_there/thesaurus/synonyms>.
MLASmart Define. "all there thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/all_there/thesaurus/synonyms>