Answer: interchanging

AnswerCrossword Clue
interchangingPut each of (two things) in the other's place
interchanging(of two or more people) Exchange (things) with each other
interchanging(of a thing) Be able to be exchanged with another
interchangingINTERCHANGE, to put each of (two things) in the place of the other also ENTERCHAUNGE