The Collaborative International Dictionary of English v.0.48:

Intermingle \In`ter*min"gle\, v. t.
   To mingle or mix together; to intermix. --Hooker.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Intermingle \In`ter*min"gle\, v. i.
   To be mixed or incorporated.
   [1913 Webster]

         Party and faction will intermingle.      --Swift.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intermingle
    v 1: combine into one; "blend the nuts and raisins together";
         "he blends in with the crowd"; "We don't intermingle much"
         [syn: blend, intermix, immingle, intermingle]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "intermingle":
   admix, alloy, amalgamate, bemingle, blend, coalesce, combine,
   commingle, commix, compose, compound, concoct, conglomerate,
   emulsify, fuse, hash, homogenize, immingle, immix, integrate,
   interblend, interfuse, interlace, interlard, intermix, intertwine,
   interweave, jumble, knead, merge, mingle, mingle-mangle, mix,
   mix up, scramble, shuffle, stir up, syncretize, throw together,
   toss together, work