6
silly
5
foolish
4
insane
3
mad
3
witless
2
brainless
2
cockeyed
2
crazy
2
goofy
2
nutty
2
unwise
1
daft
1
dense
1
dippy
1
dull
1
dumb
1
fatuous
1
harebrained
1
imprudent
1
injudicious
11 years ago|1.1k views|share |citing 
APASmart Define. (2015). sapient thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sapient/thesaurus/antonyms
ChicagoSmart Define. 2015. "sapient thesaurus" https://smartdefine.org/sapient/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, sapient thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sapient/thesaurus/antonyms>.
MLASmart Define. "sapient thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/sapient/thesaurus/antonyms>