amentia
arrested development
asininity
backwardness
battiness
blithering idiocy
brainlessness
buffoonery
clownishness
crackpottedness
crankiness
craziness
cretinism
daffiness
debility
desipience
disability
disablement
disqualification
eccentricity
fatuity
fatuousness
feebleness
folly
foolery
foolheadedness
foolishness
frivolity
frivolousness
giddiness
goofiness
half-wittedness
idiocy
idiotism
impotence
inability
inadequacy
inanity
incapability
incapacitation
incapacity
incompetence
incompetency
inefficiency
ineptitude
infancy
infantilism
inferiority
infirmity
insanity
error
fault
mental retardation
mistake
retardation
slowness
subnormality
absurdity
apathy
baseness
carelessness
depravity
destitution
frailty
helplessness
laziness
meanness
stupidity
timidity
wretchedness