The Oxford Thesaurus An A-Z Dictionary of Synonyms - dissatisfactionn.

1) discontent, discontentment, unhappiness, displeasure, non-fulfilment, disappointment, frustration, discomfort, uneasiness, disquiet, malaise: I was left with a feeling of dissatisfaction at the end of the play. 2) annoyance, irritation, dismay, displeasure: Complaints concerning dissatisfaction with the food plagued the hospital administrators.