OD, accompanier, accompanist, accompanyist, ace, acquaintance, ally, alter ego, amigo, analogon, analogue, associate, attendant, ball, be intimate, be made one, be spliced, become one, bedfellow, bedmate, better half, birthmate, boatswain, bosom buddy, bracket, breed, bride, brother, buddy, bunkie, bunkmate, butty, camarade, captain, chamberfellow, chap, chief engineer, chief mate, china, chum, classmate, close copy, close match, clubmate, co-worker, coequal, cognate, cohabit, cohort, colleague, comate, come together, commander, commit adultery, companion, companion piece, company, compeer, complement, comrade, concomitant, confidant, confrere, congenator, congener, conjugate, consociate, consort, contract matrimony, coordinate, copartner, copemate, copesmate, copulate, copy, correlate, correlative, correspondent, couchmate, counterpart, couple, couple up, cover, cradlemate, crony, crossbreed, cupmate, dead ringer, deck officer, diddle, ditto, double-harness, double-team, double, duplicate, effigy, equal, equipollent, equivalent, espouse, exact likeness, familiar, fellow, fellow student, fit together, fornicate, friend, frig, general partner, generate, get hitched, girl friend, gossip, have sex, have sexual relations, helpmate, helpmeet, hitch, hubby, husband, icon, idol, image, intermarry, interwed, intimate, jailmate, join, kindred spirit, lay, lie with, like, likeness, link up, living image, living picture, make it with, make love, make out, marry, master, match, messmate, miniature, mirroring, miscegenate, model, mount, naval officer, navigating officer, navigator, near duplicate, obverse, old crony, opposite number, pair, pair off, pal, parallel, pard, pardner, partner, patron, peer, pendant, pewmate, photograph, picture, pipes, playfellow, playmate, portrait, procreate, quartermaster, reciprocal, reflection, remarry, resemblance, rewed, rival, roommate, rubbing, sailing master, schoolfellow, schoolmate, screw, second mate, second self, secret partner, semblance, serve, service, shadow, shelfmate, shipmaster, shipmate, shopmate, side partner, sidekick, sidekicker, silent partner, similitude, simulacrum, sister, skipper, sleep with, sleeping partner, soul mate, span, special partner, spit and image, spitting image, splice, spouse, such, suchlike, synchronize, tablemate, take to wife, tally, team, team up, teammate, tentmate, the Old Man, the like of, the likes of, tie, trace, tracing, twin, unite, very image, very picture, watch officer, watchmate, waymate, wed, wife, wive, workfellow, yoke, yokefellow, yokemate