retarded
ament
amputee
anemic
apish
arrested
asinine
ass
asthenic
babbling
backward
batty
befooled
beguiled
besotted
blithering
bloodless
born fool
brainless
buffoonish
burbling
chicken
clot
cockeyed
congenital idiot
cowardly
crackbrained
cracked
crazy
credulous
cretin
cretinistic
cretinous
cripple
daffy
daft
dazed
debilitated
defective
deformity
dim-witted
dithering
dizzy
donkey
doting
driveler
driveling
drooling
drooping
beneficent
blackguard
brute
buffoon
coward
duffer
dullard
fool
idiot
impostor
madman
oaf
simpleton