Synonyms and related words :
akin, alike, ally, alter ego, analogon, analogous, analogue, associate, brother, close copy, close match, cognate, companion, comparable, complement, congenator, congener, coordinate, correlate, correlative, correspondent, corresponding, counterpart, equivalent, fellow, image, kindred spirit, like, likeness, mate, near duplicate, obverse, parallel, pendant, picture, reciprocal, second self, similar, similitude, simulacrum, sister, so, soul mate, such, tally, the like of, the likes of, twin