Ally

allierad

(person, group, state, etc., which is associated or united by treaty with another for a common (especially military or political) purpose)

allierad

(person, group, concept, etc., which is associated with another as a helper — see also auxiliary, supporter)

bundsförvant

(person, group, state, etc., which is associated or united by treaty with another for a common (especially military or political) purpose)

alliera

(to unite or form a connection between (people or things))