The Collaborative International Dictionary of English v.0.48:

Floor \Floor\, v. t. [imp. & p. p. Floored; p. pr. & vb. n.
   Flooring.]
   1. To cover with a floor; to furnish with a floor; as, to
      floor a house with pine boards.
      [1913 Webster]

   2. To strike down or lay level with the floor; to knock down;
      hence, to silence by a conclusive answer or retort; as, to
      floor an opponent.
      [1913 Webster]

            Floored or crushed by him.            --Coleridge.
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   3. To finish or make an end of; as, to floor a college
      examination. [Colloq.]
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            I've floored my little-go work.       --T. Hughes.
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The Collaborative International Dictionary of English v.0.48:

Flooring \Floor"ing\, n.
   A platform; the bottom of a room; a floor; pavement. See
   Floor, n. --Addison.
   [1913 Webster]

   2. Material for the construction of a floor or floors.
      [1913 Webster]

WordNet (r) 3.0 (2006):

flooring
    n 1: the inside lower horizontal surface (as of a room, hallway,
         tent, or other structure); "they needed rugs to cover the
         bare floors"; "we spread our sleeping bags on the dry floor
         of the tent" [syn: floor, flooring]
    2: building material used in laying floors

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "flooring":
   adobe, ashlar, base, basement, basis, bearing wall, bed, bedding,
   bedrock, brick, bricks and mortar, carpet, carpeting, cement,
   clinker, concrete, cover, covering materials, deck, doormat,
   drop cloth, duckboards, earth, ferroconcrete, firebrick, flag,
   flagstone, floor, floor covering, floorboards, fond, footing,
   foundation, fundament, fundamental, ground, ground cloth,
   ground-sheet, grounds, groundwork, hardpan, lath and plaster,
   masonry, mat, mortar, parquet, pave, pavement, paving,
   paving material, plasters, prestressed concrete, principle,
   radical, riprap, rock bottom, roofage, roofing, rudiment, rug,
   seat, siding, sill, solid ground, solid rock, stereobate, stone,
   stylobate, substratum, substruction, substructure, surfacing,
   terra firma, tile, tiling, underbuilding, undercarriage,
   undergirding, underpinning, understruction, understructure,
   walling, welcome mat