Exchange
Part of speech: noun
Definition: An act of exchanging or trading. A place for conducting trading. (telephony, US only?) The fourth through sixth digits of a ten-digit phone number (the first three before the introduction of area codes). A conversation.
Part of speech: verb
Definition: To trade or barter. To replace with a similar item.
Example sentence: So long as the system of competition in the production and exchange of the means of life goes on, the degradation of the arts will go on; and if that system is to last for ever, then art is doomed, and will surely die; that is to say, civilization will die.
Interchange
Part of speech: verb
Definition: to switch (each of two things)to mutually give and receive (something); to exchangeto swap or change placesto alternate
Part of speech: noun
Definition: An act of interchanging.A highway junction in which traffic may change from one road to another without crossing a stream of traffic.A connection between two or more lines, services or modes of transport; a station at which such a connection can be made.