Lissajous figure, alternation, back-and-forth, balance, battledore and shuttlecock, boomerang, coequality, comeback, coming and going, communion, community, commutation, cooperation, corelation, correlation, correlativism, correlativity, correspondence, counter, counterblast, counterblow, counterchange, counterstroke, cross fire, ebb and flow, equilibrium, equipollence, equivalence, exchange, flux and reflux, give-and-take, interchange, intermutation, interplay, inverse proportion, inverse ratio, inverse relationship, lex talionis, measure for measure, mutual admiration, mutual support, mutual transfer, mutuality, permutation, proportionality, quid pro quo, reciprocality, reciprocity, recoil, relativity, reply, retaliation, retort, return, rhythmic play, seesaw, seesawing, sine wave, something for something, symmetry, teeter, teeter-totter, teeter-tottering, teetering, tit for tat, to-and-fro, tottering, transposal, transposition, ups and downs, wigwag
correlation, reciprocalness, reciprocity, reciprocation
, mutuality, correlation, interdependence, interrelation, connection, link, association, interchange, exchange, barter, reciprocator, reprocitist, reciprocal, mutual, commutual, correlative, reciprocative, interrelated, closely related, alternate, interchangeable, interdependent, international, complemental, complementary, mutually, mutatis mutandis, vice versa, each other, one another, by turns, reciprocally, happy in our mutual help.
retaliation, reprisal, retort, payback, counter- stroke, counter-blast, counterplot, counter-project, retribution, lex talionis, reciprocation
, tit for tat, give and take, blow for blow, quid pro quo, a Roland for an Oliver, measure for measure, diamond cut diamond, the biter bit, a game at which two can play, reproof valiant, retort courteous, recrimination, revenge, compensation, reaction, retaliating, retaliatory, retaliative, talionic, in retaliation, en revanche, mutato nomine de te fabula narratur, par pari refero, tu quoque, you too, you're another, suo sibi gladio hunc jugulo, a beau jeu beau retour, litem _ç, lite resolvit.
interchange, exchange, commutation, permutation, intermutation, reciprocation
, transposition, rearrangement, shuffling, alternation, reciprocity, castling (at chess), hocus-pocus, interchangeableness, interchangeability, recombination, combination, barter, tit for tat, cross fire, battledore and shuttlecock, quid pro quo, interchanged, reciprocal, mutual, commutative, interchangeable, intercurrent, combinatorial, recombinant, in exchange, vice versa, mutatis mutandis, backwards and forwards, by turns, turn and turn about, each in his turn, everyone in his turn.