Answer: interchange

AnswerCrossword Clue
INTERCHANGETransfer point
INTERCHANGESwitch
interchange(of a thing) Be able to be exchanged with another
interchange(of two or more people) Exchange (things) with each other
interchangeto put each of (two things) in the place of the other also ENTERCHAUNGE
interchangePut each of (two things) in the other's place