двойник znamená v Angličtina

counterpart [counterparts]▼(either of two parts that fit together, or complement one another)
noun
[UK: ˈkaʊn.tə.pɑːt] [US: ˈkaʊn.tər.ˌpɑːrt]

dead ringer▼(someone or something that very closely resembles another; someone or something easily mistaken for another)
noun

doppelganger▼(ghostly double of a living person)
noun

double [doubles]▼(a person resembling or standing for another)
noun
[UK: ˈdʌb.l̩] [US: ˈdʌb.l̩]

lookalike [lookalikes]▼(person physically resembling another person)
noun
[UK: ˈlʊk.ə.laɪk] [US: ˈlʊk.ə.ˌlaɪk]