The Collaborative International Dictionary of English v.0.48:

Wainscot \Wain"scot\, n. [OD. waeghe-schot, D. wagen-schot, a
   clapboard, fr. OD. waeg, weeg, a wall (akin to AS. wah; cf.
   Icel. veggr) + schot a covering of boards (akin to E. shot,
   shoot).]
   [1913 Webster]
   1. Oaken timber or boarding. [Obs.]
      [1913 Webster]

            A wedge wainscot is fittest and most proper for
            cleaving of an oaken tree.            --Urquhart.
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            Inclosed in a chest of wainscot.      --J. Dart.
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   2. (Arch.) A wooden lining or boarding of the walls of
      apartments, usually made in panels.
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   3. (Zool.) Any one of numerous species of European moths of
      the family Leucanidae.
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   Note: They are reddish or yellowish, streaked or lined with
         black and white. Their larvae feed on grasses and
         sedges.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wainscot \Wain"scot\, v. t. [imp. & p. p. Wainscoted; p. pr. &
   vb. n. Wainscoting.]
   To line with boards or panelwork, or as if with panelwork;
   as, to wainscot a hall.
   [1913 Webster]

         Music soundeth better in chambers wainscoted than
         hanged.                                  --Bacon.
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         The other is wainscoted with looking-glass. --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

wainscot
    n 1: panel forming the lower part of an interior wall when it is
         finished differently from the rest of the wall [syn:
         wainscot, dado]
    2: wooden panels that can be used to line the walls of a room
       [syn: wainscot, wainscoting, wainscotting]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "wainscot":
   base, baseboard, basement, bush, bushing, ceil, chassis, dado,
   doubling, doublure, face, facing, feather, fill, filler, filling,
   foot, footing, foundation, frame, fur, inlay, inlayer, insole,
   interline, interlineation, keel, line, liner, lining, load,
   mopboard, nadir, pack, packing, pad, padding, shoemold, sole,
   stuff, stuffing, toe, wad, wadding