Concupiscence

concupiscence \kän-ˈkyü-pə-sən(t)s, kən-\ noun: strong desire, especially sexual desire

Etymology: Middle English, from Anglo-French, from Late Latin concupiscentia, from Latin concupiscent-, concupiscens, present participle of concupiscere to desire ardently, from com- + cupere to desire

This seems like the perfect word for a spelling bee.