What is another word for neglect of duty?
Pronunciation: [nɪɡlˈɛkt ɒv djˈuːti] (IPA) 
Neglect of duty is an act of irresponsibility or failure to perform one's obligations. It is the abandonment or disregard of a task or responsibility assigned to an individual. There are several synonyms for neglect of duty, including negligence, dereliction, carelessness, nonchalance, heedlessness, and disregard. Negligence refers to a lack of care or attention towards one's duty; dereliction implies a deliberate refusal to fulfill one's obligations. Carelessness suggests haphazard or neglectful behavior, while nonchalance implies an indifferent attitude. Heedlessness means disregarding what one should be doing, and disregard signifies a complete lack of concern. All these terms connote an individual lacking in his/her duties.
