Definition of "Interchange" :

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

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

"He earns his living from the interchange of currency."

noun: the act of changing one thing for another thing

"There was an interchange of prisoners."

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

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

verb: cause to change places

"Interchange this screw for one of a smaller size."

verb: give to, and receive from, one another

verb: put in the place of another; switch seemingly equivalent items

"Synonyms can be interchanged without a changing the context's meaning."