Dormer

dormer
    n 1: a gabled extension built out from a sloping roof to
         accommodate a vertical window [syn: {dormer}, {dormer
         window}]
    

Dormant \Dor"mant\, n. [See {Dormant}, a.] (Arch.)
   A large beam in the roof of a house upon which portions of
   the other timbers rest or " sleep." --Arch. Pub. Soc. --
   Called also {dormant tree}, {dorman tree}, {dormond}, and
   {dormer}. --Halliwell. Dormer
    

Dormer \Dor"mer\, or Dormer window \Dor"mer win"dow\, n.
   [Literally, the window of a sleeping apartment. F. dormir to
   sleep. See {Dormant}, a. & n.] (Arch.)
   A window pierced in a roof, and so set as to be vertical
   while the roof slopes away from it. Also, the gablet, or
   houselike structure, in which it is contained.
   [1913 Webster]
    

26 Moby Thesaurus words for "dormer":
      bay, bay window, bow window, casement, casement window, fan window,
      fanlight, grille, lancet window, lantern, lattice, light,
      louver window, oriel, pane, picture window, port, porthole,
      rose window, skylight, transom, wicket, window, window bay,
      window glass, windowpane