look–alike 
/ˈlʊkəˌlaɪk/ noun
plural look–alikes /ˈlʊkəˌlaɪk/ noun [count] : someone or something that looks like another person or thing
▪ She and her cousin are look-alikes. [=they look like each other; they look very similar] ▪ a young actor who is a John Wayne look-alike [=a young actor who looks like John Wayne]
▪ She and her cousin are look-alikes. [=they look like each other; they look very similar] ▪ a young actor who is a John Wayne look-alike [=a young actor who looks like John Wayne]
— look–alike adjective always used before a noun
▪ two look-alike cousins
▪ two look-alike cousins
