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