interchange

a junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams

mutual interaction; the activity of reciprocating or exchanging (especially information)

the act of changing one thing for another thing

Adam was promised immortality in exchange for his disobedience

reciprocal transfer of equivalent sums of money (especially the currencies of different countries)

he earns his living from the interchange of currency

put in the place of another; switch seemingly equivalent items

the con artist replaced the original with a fake Rembrandt