Synonyms to silent partner

bedmate, ace, amigo, associate, bedfellow, birthmate, bosom buddy, buddy, bunkie, bunkmate, butty, camarade, chamberfellow, chum, classmate, clubmate, colleague, comate, companion, company, compeer, comrade, confrere, consociate, consort, copartner, copemate, copesmate, couchmate, cradlemate, crony, cupmate, fellow, fellow student, general partner, girl friend, gossip, jailmate, mate, messmate, old crony, pal, pard, pardner, partner, pewmate, playfellow, playmate, roommate, schoolfellow, schoolmate, secret partner, shelfmate, shipmate, shopmate, side partner, sidekick, sidekicker, sleeping partner, special partner, tablemate, teammate, tentmate, watchmate, waymate, workfellow, yokefellow, yokemate, a party to, accessory, accompanier, accompanist, accompanyist, accomplice, accumulate, act in concert, act together, affiliate, agglomerate, aggregate, aggroup, ally, alter ego, amalgamate, amass, assemble, assistant, attendant, band, band together, batch, be in cahoots, be in league, better half, bring together, bulk, bu