PUN
noun
a joke exploiting the different possible meanings of a word or the fact that there are words which sound alike but have different meanings:
DOUBLE ENTENDRES
noun (plural double entendres | ˌdo͞obəl ˌänˈtändrə |)
a word or phrase that is open to two interpretations, one of which is usually risqué or indecent:
SYNONYM
noun
a word or phrase that means exactly or nearly the same as another word or phrase in the same language, for example shut is a synonym of close: “shut” is a synonym of “close” | “the East” was a synonym for the Soviet empire.