exchanging

swap

alternate bandy bargain barter castle change commute correspond displace flip-flop interchange invert market network rearrange reciprocate replace reverse revise seesaw shift shuffle shuttle substitute switch traffic transact transfer transpose truck

buy and sell cash in change hands contact with convert into deal in give and take go over to hook up horse trade link up pass to pay back return the compliment swap horses turn the tables

continue deny hold keep leave alone refuse remain