The Collaborative International Dictionary of English v.0.48:

Loose \Loose\ (l[=oo]s), v. n. [imp. & p. p. Loosed
   (l[=oo]st); p. pr. & vb. n. Loosing.] [From Loose, a.]
   1. To untie or unbind; to free from any fastening; to remove
      the shackles or fastenings of; to set free; to relieve.
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            Canst thou . . . loose the bands of Orion ? --Job.
                                                  xxxviii. 31.
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            Ye shall find an ass tied, and a colt with her;
            loose them, and bring them unto me.   --Matt. xxi.
                                                  2.
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   2. To release from anything obligatory or burdensome; to
      disengage; hence, to absolve; to remit.
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            Art thou loosed from a wife ? seek not a wife. --1
                                                  Cor. vii. 27.
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            Whatsoever thou shalt loose on earth shall be loosed
            in heaven.                            --Matt. xvi.
                                                  19.
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   3. To relax; to loosen; to make less strict.
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            The joints of his loins were loosed.  --Dan. v. 6.
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   4. To solve; to interpret. [Obs.] --Spenser.
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Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "loosing":
   demobilization, discharge, dismissal, parole, release, unbinding,
   unbolting, unbridling, unbuckling, uncaging, unchaining,
   unfettering, ungagging, unhanding, unharnessing, unhobbling,
   unlashing, unlatching, unleashing, unlocking, unloosing,
   unmanacling, unmuzzling, unpenning, unshackling, unstrapping,
   untethering, untrussing, untying, unyoking