Synonyms for Unsatisfied (same or very similar meaning)
WordNet sense 1 (not having been satisfied):
unsated, unsatiatedWordNet sense 2 (impossible to satisfy):
insatiate, unsatiableWordNet sense 3 (worried and uneasy):
restless, ungratifiedWordNet sense 4 (showing or experiencing dissatisfaction or restless longing):
discontent, discontentedFrom the ODE community, based on WordNetadd/edit