Synonyms and related words :
agency, alternation, balance, ballast, battledore and shuttlecock, blow for blow, change, coaction, commutation, complementary distribution, concurrence, consideration, cooperation, counterbalance, counterchange, counterpoise, counterweight, cross fire, delegation, deputation, deputyship, displacement, engagement, equipoise, equivalent, exchange, give-and-take, interaction, interchange, intercommunication, intercourse, interlacing, intermeshing, intermutation, interplay, intertwining, interweaving, interworking, law of retaliation, lex talionis, like for like, makeweight, measure for measure, mesh, meshing, mutual admiration, mutual support, mutual transfer, mutuality, offset, permutation, power of attorney, reciprocality, reciprocation, reciprocity, replacement, representation, retaliation, seesaw, setoff, something for something, something in return, something of value, subrogation, substitution, supersedence, superseding, supersedure, supersession, supplantation, supplanting, supplantment, switch, talion, tit for tat, transposal, transposition, vicariousness