WordNet (r) 3.0 (2006):

unplug
    v 1: pull the plug of (electrical appliances) and render
         inoperable; "unplug the hair dryer after using it" [syn:
         unplug, disconnect] [ant: connect, plug in, plug
         into]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "unplug":
   bare, clear, deobstruct, disclose, expose, free, manifest, patefy,
   reveal, unblock, uncase, unclench, unclog, unclutch, uncork,
   uncover, uncurtain, undo, undrape, unfold, unfoul, unlatch, unlock,
   unroll, unseal, unsheathe, unshut, unstop, unveil, unwrap