What is the proper word a person from the U.S.(or any other country) givin out information to other countries?

basically it could trying to overthrow their own gov't, or just vital info. the person that orignally asked me the question is not satisfied with the possible answers i gave. i said traitor, treason, treachery, sell out. she insists its some other distinct name or term your given for such an act. i have exhausted my ideas. thnx