The Collaborative International Dictionary of English v.0.48:

Yoke \Yoke\, v. t. [imp. & p. p. Yoked; p. pr. & vb. n.
   Yoking.]
   [1913 Webster]
   1. To put a yoke on; to join in or with a yoke; as, to yoke
      oxen, or pair of oxen.
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   2. To couple; to join with another. "Be ye not unequally
      yoked with unbelievers." --2 Cor. vi. 14.
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            Cassius, you are yoked with a lamb.   --Shak.
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   3. To enslave; to bring into bondage; to restrain; to
      confine.
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            Then were they yoked with garrisons.  --Milton.
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            The words and promises that yoke
            The conqueror are quickly broke.      --Hudibras.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "yoked":
   affiliate, affiliated, allied, assembled, associate, associated,
   banded together, biconjugate, bigeminate, bijugate, bound,
   bracketed, collateral, collected, conjoined, conjugate, conjugated,
   connected, copulate, correlated, coupled, gathered, hand-in-glove,
   hand-in-hand, implicated, incorporated, integrated, interlinked,
   interlocked, interrelated, intimate, involved, joined, knotted,
   leagued, linked, matched, mated, merged, of that ilk, of that kind,
   paired, parallel, related, spliced, tied, twinned, undivided,
   united, unseparated, wed, wedded