inobservance (?.)
- 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
- unwariness
- unwatchfulness
