nonperformance (n.)
- culpa
- default
- delinquency
- dereliction
- disregard
- failure
- inadvertence
- inadvertency
- inattention
- lapse
- laxity
- laxness
- looseness
- neglect
- neglectfulness
- negligence
- nonaccomplishment
- nonachievement
- noncompliance
- nonconformance
- nonconformity
- nonfeasance
- noninterference
- nonobservance
- omission
- oversight
- permissiveness
- procrastination
- remissness
- slackness
- slight
