97 entries under keen topic. ×

1
grave(adjective, reasonable, sensible, sober)
1
handy(adjective, good, smooth, sharp)
1
heady(adjective, smooth, sharp, smart)
1
in the know(expression, adjective, idiom, smooth)
1
incisive(understanding, smart, alert, sensitive)
1
intent(adjective, reasonable, deep, rational)
1
intuitive(adjective, understanding, sharp, smart)
1
levelheaded(adjective, reasonable, sensible, deep)
1
meditative(adjective, reasonable, deep, rational)
1
melancholy(adjective, reasonable, deep, rational)
1
museful(adjective, reasonable, deep, rational)
1
musing(adjective, reasonable, deep, rational)
1
observant(adjective, understanding, cool, sharp)
1
penetrative(adjective, understanding, sharp, smart)
1
pensive(adjective, reasonable, deep, rational)
1
philosophic(adjective, reasonable, deep, sober)
1
pondering(adjective, reasonable, deep, rational)
1
preoccupied(adjective, reasonable, deep, rational)
1
quick on the uptake(expression, idiom, smart, intelligent)
1
rapt(adjective, reasonable, deep, rational)
10 years ago|14k views|share |citing 
APASmart Define. (2016). brainy thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/brainy/thesaurus/synonyms
ChicagoSmart Define. 2016. "brainy thesaurus" https://smartdefine.org/brainy/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, brainy thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/brainy/thesaurus/synonyms>.
MLASmart Define. "brainy thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/brainy/thesaurus/synonyms>