The Collaborative International Dictionary of English v.0.48:

interweave \in`ter*weave"\, v. t. [imp. & obs. p. p.
   interwove; p. p. interwoven; p. pr. & vb. n.
   interweaving.]
   [1913 Webster]
   1. To weave together; to intermix or unite in texture or
      construction; to intertwine; as, threads of silk and
      cotton interwoven.
      [1913 Webster]

            Under the hospitable covert nigh
            Of trees thick interwoven.            --Milton.
      [1913 Webster]

   2. To intermingle; to unite intimately; to connect closely;
      as, to interweave truth with falsehood. --Dryden.
      [1913 Webster]

            Words interwove with sighs found out their way.
                                                  --Milton.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "interweaving":
   alternation, braiding, coaction, complementary distribution,
   concurrence, cooperation, engagement, enlacement, entwinement,
   entwining, fabric, interaction, interchange, intercommunication,
   intercourse, interknitting, interlacement, interlacery,
   interlacing, intermeshing, interplay, intertexture, interthreading,
   intertieing, intertwinement, intertwining, intertwisting,
   interweavement, interworking, knitting, lacing, mesh, meshing,
   plaiting, quid pro quo, seesaw, texture, tissue, tit for tat,
   twining, twisting, warp and woof, warpage, weave, weaving, web,
   weftage, wreathing