3
sane(adjective, sound, stupid, wise, insane)
2
sagacious(adjective, smart, judicious)
2
thoughtful(adjective, sound, wise)
2
astute(adjective, stupid)
2
brainstorm
2
compensate
2
perspicacious
2
realistic(adjective, sound, wise)
2
sage
2
unfoolish(adjective, sound, wise, nerdy)
2
wary(adjective, careless, certain, careful, cautious)
1
ruminative
1
insightful
1
perceptive(careless, insensitive)
1
reasonable(adjective, sound, wise)
1
sapient
1
adroit
1
advisable
1
all-knowing
1
artful
10 years ago|4.6k views|share |citing 
APASmart Define. (2016). foolish thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/foolish/thesaurus/antonyms
ChicagoSmart Define. 2016. "foolish thesaurus" https://smartdefine.org/foolish/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, foolish thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/foolish/thesaurus/antonyms>.
MLASmart Define. "foolish thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/foolish/thesaurus/antonyms>