The Collaborative International Dictionary of English v.0.48:

Storehouse \Store"house`\, n.
   1. A building for keeping goods of any kind, especially
      provisions; a magazine; a repository; a warehouse.
      [1913 Webster]

            Joseph opened all the storehouses, and sold unto
            Egyptians.                            --Gen. xli.
                                                  56.
      [1913 Webster]

            The Scripture of God is a storehouse abounding with
            estimable treasures of wisdom and knowledge.
                                                  --Hooker.
      [1913 Webster]

   2. A mass or quality laid up. [Obs.] --Spenser.
      [1913 Webster]

WordNet (r) 3.0 (2006):

storehouse
    n 1: a depository for goods; "storehouses were built close to
         the docks" [syn: storehouse, depot, entrepot,
         storage, store]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "storehouse":
   Fort Knox, archives, armory, arsenal, attic, bank, basement, bay,
   bin, bonded warehouse, bookcase, box, bunker, bursary, buttery,
   cargo dock, cash register, cashbox, cellar, chest, closet, coffer,
   coin box, conservatory, crate, crib, cupboard, depositary,
   depository, depot, dock, drawer, dump, exchequer, fisc, glory hole,
   godown, gold depository, hold, hutch, library, locker, lumber room,
   lumberyard, magasin, magazine, money chest, penny bank, piggy bank,
   pork barrel, public crib, public till, public treasury,
   public trough, rack, repertory, repository, reservoir, rick, safe,
   safe-deposit box, shelf, stack, stack room, stock room, storage,
   store, storeroom, strong room, strongbox, subtreasury, supply base,
   supply depot, tank, till, treasure house, treasure room,
   treasure-house, treasury, vat, vault, warehouse, wine cellar