deserter
NounWordNet 3.0
Webster's Dictionary (GCIDE)
Deserter \De*sert"er\ (d[-e]*z[~e]rt"[~e]r), n. One who forsakes a duty, a cause or a party, a friend, or any one to whom he owes service; especially, a soldier or a seaman who abandons the service without leave; one guilty of desertion. [1913 Webster]