The Collaborative International Dictionary of English v.0.48:

Rug \Rug\, v. t.
   To pull roughly or hastily; to plunder; to spoil; to tear.
   [Scot.] --Sir W. Scott.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rug \Rug\, n. [Cf. Sw. rugg entanglend hair, ruggig rugged,
   shaggy, probably akin to E. rough. See Rough, a.]
   1. A kind of coarse, heavy frieze, formerly used for
      garments.
      [1913 Webster]

            They spin the choicest rug in Ireland. A friend of
            mine . . . repaired to Paris Garden clad in one of
            these Waterford rugs. The mastiffs, . . . deeming he
            had been a bear, would fain have baited him.
                                                  --Holinshed.
      [1913 Webster]

   2. A piece of thick, nappy fabric, commonly made of wool, --
      used for various purposes, as for covering and ornamenting
      part of a bare floor, for hanging in a doorway as a
      poti[`e]re, for protecting a portion of carpet, for a wrap
      to protect the legs from cold, etc.
      [1913 Webster]

   3. A rough, woolly, or shaggy dog.
      [1913 Webster]

   Rug gown, a gown made of rug, of or coarse, shaggy cloth.
      --B. Johnson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rug
    n 1: floor covering consisting of a piece of thick heavy fabric
         (usually with nap or pile) [syn: rug, carpet,
         carpeting]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "rug":
   Axminster, Brussels carpet, Caucasian rug, Chinese rug,
   East Indian rug, Indian rug, Oriental rug, Persian rug, Savonnerie,
   Turkish rug, Wilton, afghan, air mattress, bed linen, bedclothes,
   bedcover, bedding, bedsheet, bedspread, blanket, body Brussels,
   bolster, broadloom, buffalo robe, carpet, carpeting, case, clothes,
   comfort, comforter, contour sheet, counterpane, cover, coverlet,
   coverlid, cushion, doormat, drop cloth, drugget, duckboards,
   eiderdown, fitted sheet, floorboards, flooring, ground cloth,
   ground-sheet, ingrain, innerspring mattress, lap robe, linen,
   litter, mat, mattress, moquette, namda, nammad, pad, pallet,
   patchwork quilt, pave, pavement, pillow, pillow slip, pillowcase,
   quilt, robe, rugs, sheet, sheeting, sleeping bag, slip, spread,
   springs, throw rug, tiling, underbed, underbedding, welcome mat