twin

1 either of a pair matched in one or more qualities I've found one sock but can't find its twin Synonyms companion, fellow, half, match, mateRelated Words coordinate; coequal, counterpart, equal, equivalent, like, parallel, peer, rival; carbon copy, double, duplicate, facsimile, identical twin, likeness, mirror image, replica, ringer; analogue (or analog), similarityNear Antonyms antipode, antithesis, contrary, converse, opposite, reverse

2 something or someone that strongly resembles another some of these people who think that they're a given movie star's twin are kidding themselves Synonyms alter ego, carbon, carbon copy, clone, counterpart, doppelgänger (or doppelganger), double, duplicate, duplication, facsimile, fetch, likeness, look-alike, match, mirror image, picture, replica, ringer, spit, spitting image, imageRelated Words Chinese copy; effigy, portrait, portrayal; companion, fellow, mate; equal, equivalent; analogue (or analog), parallelNear Antonyms antithesis, converse, opposite, reverse