The Collaborative International Dictionary of English v.0.48:

Amalgamate \A*mal"ga*mate\, v. t. [imp. & p. p. Amalgamated;
   p. pr. & vb. n. Amalgamating.]
   1. To compound or mix, as quicksilver, with another metal; to
      unite, combine, or alloy with mercury.
      [1913 Webster]

   2. To mix, so as to make a uniform compound; to unite or
      combine; as, to amalgamate two races; to amalgamate one
      race with another.
      [1913 Webster]

            Ingratitude is indeed their four cardinal virtues
            compacted and amalgamated into one.   --Burke.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Amalgamate \A*mal"ga*mate\, v. i.
   1. To unite in an amalgam; to blend with another metal, as
      quicksilver.
      [1913 Webster]

   2. To coalesce, as a result of growth; to combine into a
      uniform whole; to blend; as, two organs or parts
      amalgamate.
      [1913 Webster] Amalgamate

The Collaborative International Dictionary of English v.0.48:

Amalgamate \A*mal"ga*mate\, Amalgamated \A*mal"ga*ma`ted\, a.
   Coalesced; united; combined.
   [1913 Webster]

WordNet (r) 3.0 (2006):

amalgamate
    adj 1: joined together into a whole; "United Industries"; "the
           amalgamated colleges constituted a university"; "a
           consolidated school" [syn: amalgamate, amalgamated,
           coalesced, consolidated, fused]
    v 1: to bring or combine together or with something else;
         "resourcefully he mingled music and dance" [syn: mix,
         mingle, commix, unify, amalgamate]

Moby Thesaurus II by Grady Ward, 1.0:

112 Moby Thesaurus words for "amalgamate":
   act in concert, act together, add, admix, affiliate, alloy, ally,
   assimilate, associate, band, band together, be in league, bemingle,
   blend, club together, coact, coalesce, collaborate, collude,
   combine, come together, commingle, commix, compact, compose,
   compound, comprise, concert, concoct, concord, concur, confederate,
   conglomerate, connect, consolidate, conspire, cooperate,
   do business with, embody, emulsify, encompass, federate, flux,
   fuse, get heads together, get together, go partners, hang together,
   harmonize, hash, hold together, homogenize, hook up, immingle,
   immix, include, incorporate, integrate, interblend, interfuse,
   interlace, interlard, intermingle, intermix, intertwine,
   interweave, join, join in, join together, jumble, keep together,
   knead, league, league together, lump together, make common cause,
   make one, meld, melt into one, merge, mingle, mingle-mangle, mix,
   mix up, partner, play ball, pull together, put heads together,
   put together, reciprocate, reembody, roll into one, scramble,
   shade into, shuffle, solidify, stand together, stir up, syncretize,
   syndicate, synthesize, team up, throw in together, throw together,
   tie in, tie up, toss together, unify, unite, unite efforts, work,
   work together