transvestism

noun

trans·​ves·​tism tran(t)s-ˈves-ˌtiz-əm, tranz- 

variants also transvestitism

-ˈves-ˌtit-ˌiz-əm 

: the practice of adopting the dress, the manner, and sometimes the sexual role of the opposite sex

transvestite

tran(t)s-ˈves-ˌtīt, tranz-

adjective or noun