exchange / ɪksˈtʃeɪndʒ /
verb (used with object), ex·changed, ex·chang·ing.
to give up (something) for something else; part with for some equivalent; change for another.
to replace (returned merchandise) with an equivalent or something else:
Most stores will allow the purchaser to exchange goods.
verb (used without object), ex·changed, ex·chang·ing.
to make an exchange; engage in bartering, replacing, or substituting one thing for another.
to pass or be taken in exchange or as an equivalent.
the act, process, or an instance of exchanging:
The contesting nations arranged for an exchange of prisoners; money in exchange for services.
something that is given or received in exchange or substitution for something else:
The car was a fair exchange.