interplay

interplay
    n 1: reciprocal action and reaction
    

Interplay \In`ter*play`\, n.
   Mutual action or influence; interaction; as, the interplay of
   affection.
   [1913 Webster]
    

82 Moby Thesaurus words for "interplay":
      ESP, alternation, answer, battledore and shuttlecock, coact,
      coaction, commerce, communication, communion, commutation,
      complementary distribution, concurrence, congress, connection,
      contact, conversation, converse, cooperate, cooperation,
      correspondence, counterchange, cross fire, dealing, dealings,
      dovetail, engage, engagement, exchange, give-and-take, information,
      interact, interaction, interchange, intercommunication,
      intercommunion, intercourse, interlace, interlacing, intermesh,
      intermeshing, intermutation, intertwine, intertwining, interweave,
      interweaving, interwork, interworking, lex talionis,
      linguistic intercourse, measure for measure, mesh, meshing,
      message, mortise, mutual admiration, mutual support,
      mutual transfer, mutuality, permutation, quid pro quo,
      reciprocality, reciprocation, reciprocity, reply, response,
      retaliation, seesaw, social intercourse, something for something,
      speaking, speech, speech circuit, speech situation, talking,
      telepathy, tit for tat, touch, traffic, transposal, transposition,
      truck, two-way communication