consolidative, unifying

from The Collaborative International Dictionary of English v.0.48

integrative \integrative\ adj.
   1. tending to combine and coordinate diverse elements into a
      whole. [Narrower terms: {consolidative, unifying};
      {plastic )}] Also See: {collective}, {combinative},
      {integrated}. Antonym: {disintegrative}.
      [WordNet 1.5]

   2. centralizing(prenominal). Opposite of {decentralizing}.

   Syn: consolidative.
        [WordNet 1.5]