apish
asinine
batty
befooled
beguiled
besotted
brainless
buffoonish
cockeyed
crazy
credulous
daffy
daft
dazed
dizzy
doting
dumb
fatuitous
fatuous
flaky
fond
fool
foolish
fuddled
futile
gaga
goofy
gulled
idiotic
imbecile
inane
inept
infatuated
insane
kooky
loony
mad
maudlin
moronic
nutty
sappy
screwy
senseless
sentimental
silly
stupid
thoughtless
wacky
wet
witless