foolish
idiotical
insane
retarded
apish
arrested
asinine
babbling
backward
batty
befooled
beguiled
besotted
blithering
brainless
buffoonish
burbling
cockeyed
common
crackbrained
cracked
crazy
credulous
cretinistic
cretinous
daffy
daft
dazed
dithering
dizzy
doting
driveling
drooling
dumb
fatuitous
fatuous
flaky
fond
fool
foolheaded
fuddled
futile
gaga
goofy
gulled
half-baked
half-witted
imbecile
imbecilic
inane
idiocy
idiot
idiotically
bizarre
hysterical
incomprehensible
irrational
ludicrous
meaningless
naive
outrageous
perverse
senseless
silly
trivial
antibiotic
aquatic
astronautic
chaotic
despotic
erotic
exotic
hypnotic
narcotic
neurotic
patriotic
psychotic
quixotic
robotic
semiotic
symbiotic
unpatriotic