nonaccomplishment, nonachievement - an act that does not achieve its intended goal

dereliction - willful negligence

comparative negligence - (law) negligence allocated between the plaintiff and the defendant with a corresponding reduction in damages paid to the plaintiff

concurrent negligence - (law) negligence of two of more persons acting independently; the plaintiff may sue both together or separately

contributory negligence - (law) behavior by the plaintiff that contributes to the harm resulting from the defendant's negligence; in common law any degree of contributory negligence would bar the plaintiff from collecting damages

criminal negligence, culpable negligence - (law) recklessly acting without reasonable caution and putting another person at risk of injury or death (or failing to do something with the same consequences)

neglect of duty - (law) breach of a duty

dodging, evasion, escape - nonperformance of something distasteful (as by deceit or trickery) that you are supposed to do; "his evasion of his clear duty was reprehensible"; "that escape from the consequences is possible but unattractive"

carelessness - the quality of not being careful or taking pains

dereliction, willful neglect, delinquency - a tendency to be negligent and uncaring; "he inherited his delinquency from his father"; "his derelictions were not really intended as crimes"; "his adolescent protest consisted of willful neglect of all his responsibilities"

laxity, laxness, remissness - the quality of being lax and neglectful