ace, adjunct, ally, amigo, associate, bedmate, bosom buddy, brother, brother-in-arms, buddy, bunkie, bunkmate, butty, camarade, chamberfellow, chum, classmate, coadjutor, cohort, colleague, comate, companion, company, compatriot, compeer, comrade, confederate, confrere, consociate, consort, copartner, crony, fellow, fellow member, fellow student, girl friend, gossip, mate, messmate, old crony, pal, pard, pardner, partner, playfellow, playmate, roommate, schoolfellow, schoolmate, shipmate, side partner, sidekick, teammate, workfellow, yokefellow, yokemate