compartment

compartment
    n 1: a space into which an area is subdivided
    2: a partitioned section, chamber, or separate room within a
       larger enclosed area
    

Compartment \Com*part"ment\, n. [F. compartiment, OF. compartir
   to divide. See {Compart}.]
   1. One of the parts into which an inclosed portion of space
      is divided, as by partitions, or lines; as, the
      compartments of a cabinet, a house, or a garden.
      [1913 Webster]

            In the midst was placed a large compartment composed
            of grotesque work.                    --Carew.
      [1913 Webster]

   2. (Shipbuilding) One of the sections into which the hold of
      a ship is divided by water-tight bulkheads.
      [1913 Webster] compartmental
    

53 Moby Thesaurus words for "compartment":
      alcove, bay, below, between-decks, boiler room, booth, box, brig,
      bunker, cabin, caboose, camboose, cavity, cell, cellule, chamber,
      chart room, conning tower, crib, crypt, cubicle, division,
      enclosed space, engine room, forecastle, forepeak, galley, head,
      hold, hole, hollow, lazaret, locker, manger, niche, part,
      partition, pew, pilothouse, quarters, radio room, roundhouse,
      sail loft, section, sick bay, slot, space, stall, stateroom,
      stokehold, topside, vault, wardroom