Exchange
Trading, swapping, bartering, converting, transferring, substituting, replacing, transacting, dealing, negotiating, interchanging, reciprocating, switching, giving and taking, trading off, converting, swapping, transferring, bartering, substituting, replacing, transacting, dealing, negotiating, interchanging, reciprocating, switching, giving and taking, trading off, converting, swapping, transferring, bartering, substituting, replacing, transacting, dealing, negotiating, interchanging, reciprocating, switching, giving and taking, trading off.
