interchange

reverse (a direction, attitude, or course of action)

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

the act of changing one thing for another thing

“there was an interchange of prisoners”

give to, and receive from, one another

put in the place of another; switch seemingly equivalent items

“synonyms can be interchanged without a changing the context's meaning”

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

“he earns his living from the interchange of currency”

cause to change places

“interchange this screw for one of a smaller size”

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