Doppelganger, Janus-like, accessory, accompanying, actual thing, alike, all one, all the same, ally, alter ego, ambidextrous, analogon, analogous, analogue, associate, associated, attendant, attending, bifacial, bifold, biform, bifurcated, bilateral, binary, binate, biparous, bipartisan, bipartite, bivalent, brother, carbon copy, clone, close copy, close match, coequal, cognate, coincident, collateral, combine, combined, companion, comparable, compeer, complement, concomitant, concurrent, conduplicate, congenator, congener, conjoint, connect, consubstantial, coordinate, copy, correlate, correlative, correspondent, corresponding, counterpart, couple, coupled, dead ringer, dichotomous, disomatous, ditto, double-faced, double, duadic, dual, dualistic, dupe, duple, duplex, duplicate, duplicated, dyadic, effigy, equal, equipollent, equivalent, exact counterpart, exact likeness, exactly alike, facsimile, fellow, geminate, geminated, homograph, homonym, homoousian, homophone, icon, idem, identic, identical, identical same, idol, image, indistinguishable, ingeminate, join, joined, joint, just alike, kindred spirit, like, likeness, link, living image, living picture, match, matched, matching, mate, miniature, mirroring, model, multiply by two, mutual, near duplicate, no other, none other, obverse, of a kind, of a piece, of a size, one, opposite number, pair, paired, parallel, paralleling, peer, pendant, photograph, picture, portrait, reciprocal, redouble, reduplicate, reflection, repeat, replica, replicate, reproduce, resemblance, ringer, rival, rubbing, same, second, second self, secondary, selfsame, semblance, shadow, similar, similitude, simulacrum, simultaneous, sister, soul mate, spit and image, spitting image, such, suchlike, synonym, tally, the like of, the likes of, the same, the same difference, trace, tracing, twain, twinned, two-faced, two-level, two-ply, two-sided, two-story, two, twofold, undifferent, very image, very picture, very same, without difference, without distinction, yoke