amentia
arrested development
babyishness
backwardness
blithering idiocy
childishness
cretinism
half-wittedness
idiocy
idiotism
imbecility
immaturity
insanity
mental defectiveness
mental deficiency
mental handicap
mental retardation
mongolianism
mongolism
mongoloid idiocy
moronism
moronity
profound idiocy
puerilism
puerility
retardation
retardment
simple-wittedness
simplemindedness
simpleness
simplicity
subnormality
misbehavior
misbehaviour
misdeed
infantilist
centrality
cystocele
flatulence
ophthalmia
pervasiveness
pleurisy
purpura
rectocele
stomachache
tropism
ulceration
vomit