companion   
longo
a friend; a companion in evil-doing [Hallanger 1973]
namana
a companion, a partner, a comrade, a neighbour. See sakaiza, Havana. [Richardson 1885]
a companion, a neighbor; an accomplice; a thing that belongs with something else, as one of a pair [Hallanger 1973]
sakaiza
a friend, a companion; used of the opposite sex it means a paramour [Hallanger 1973]