Synonyms and related words :
au pair, back, by turns, en revanche, even, exchangeably, for a consideration, in amends, in answer, in compensation, in consideration, in exchange, in rebuttal, in reciprocation, in reparation, in reply, in reprisal, in requital, in response, in retaliation, in retribution, in revenge, in turn, mutually, reciprocally, turn about