absurdity
aimlessness
asininity
battiness
blank mind
blankmindedness
blankness
bootlessness
brainlessness
buffoonery
calm of mind
clownishness
counterproductiveness
counterproductivity
crackpottedness
crankiness
craziness
daffiness
desipience
eccentricity
emptiness
emptiness of mind
empty-headedness
failure
fallow mind
fatuousness
fecklessness
folly
foolery
foolheadedness
foolishness
frivolity
frivolousness
fruitlessness
futility
giddiness
goofiness
hollowness
idiocy
imbecility
impotence
inanity
ineffectiveness
ineffectuality
ineffectualness
inefficaciousness
inefficacy
ineptitude
insanity
invalidity
unwiseness
fatuous
baseness
callousness
foolhardiness
forgetfulness
impertinence
improvidence
imprudence
inattention
perverseness
perversity
petulance
rashness
senselessness
silliness
stupidity
temerity
unfairness
unreasonableness
wantonness
wilfulness