Leagued

from The Collaborative International Dictionary of English v.0.48

League \League\, v. i. [imp. & p. p. {Leagued}; p. pr. & vb. n.
   {Leaguing}.] [Cf. F. se liguer. See 2d {League}.]
   To unite in a league or confederacy; to combine for mutual
   support; to confederate. --South.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

76 Moby Thesaurus words for "leagued":
      accumulated, affiliate, affiliated, agglomerate, aggregate, allied,
      amassed, assembled, associate, associated, banded together, bound,
      bracketed, bunched, bundled, cabalistic, clumped, clustered,
      collected, combined, confederate, confederated, conglomerate,
      congregate, congregated, conjoined, connected, conspiratorial,
      copulate, corporate, coupled, cumulate, enleagued, fascicled,
      fasciculated, federate, federated, gathered, glomerate,
      hand-in-glove, hand-in-hand, heaped, in cahoots, in league,
      in partnership, in session, in with, incorporated, integrated,
      intimate, joined, joint, knotted, linked, lumped, married, massed,
      matched, mated, meeting, merged, packaged, paired, partners with,
      piled, spliced, stacked, teamed, tied, undivided, united,
      unseparated, wed, wedded, wrapped up, yoked