absentmindedness
carelessness
default
delinquency
dereliction
disconformity
disregard
disregardfulness
distraction
failure
flightiness
flippancy
frivolousness
giddiness
heedlessness
inadvertence
inadvertency
inattention
inattentiveness
inconsideration
incuriosity
indifference
laxity
levity
lightmindedness
neglect
negligence
nonadherence
noncompliance
nonconformance
nonconformity
nonfeasance
nonfulfillment
nonobservance
nonperformance
obliviousness
omission
oversight
regardlessness
shallowness
slight
superficiality
thoughtlessness
unalertness
unawareness
unconsciousness
unheedfulness
unintentiveness
unmindfulness
unobservance