Appointment : an arrangement to meet someone at a particular time and place.Disappointment : sadness or displeasure caused by the non-fulfilment of one's hopes or expectations.Discharge : tell (someone) officially that they can or must leave a place or situation.Suspension : the action of suspending someone or something or the condition of being suspended.Dismissal : the act of ordering or allowing someone to leave.Antonym of Appointment is Dismissal