The Collaborative International Dictionary of English v.0.48:

Armory \Ar"mo*ry\, n.; pl. Armories. [OF. armaire, armarie, F.
   armoire, fr. L. armarium place for keeping arms; but confused
   with F. armoiries. See Armorial, Ambry.]
   1. A place where arms and instruments of war are deposited
      for safe keeping.
      [1913 Webster]

   2. Armor; defensive and offensive arms.
      [1913 Webster]

            Celestial armory, shields, helms, and spears.
                                                  --Milton.
      [1913 Webster]

   3. A manufactory of arms, as rifles, muskets, pistols,
      bayonets, swords. [U.S.]
      [1913 Webster]

   4. Ensigns armorial; armorial bearings. --Spenser.
      [1913 Webster]

   5. That branch of heraldry which treats of coat armor.
      [1913 Webster]

            The science of heraldry, or, more justly speaking,
            armory, which is but one branch of heraldry, is,
            without doubt, of very ancient origin. --Cussans.
      [1913 Webster]

WordNet (r) 3.0 (2006):

armory
    n 1: a collection of resources; "he dipped into his intellectual
         armory to find an answer" [syn: armory, armoury,
         inventory]
    2: all the weapons and equipment that a country has [syn:
       arsenal, armory, armoury]
    3: a military structure where arms and ammunition and other
       military equipment are stored and training is given in the
       use of arms [syn: arsenal, armory, armoury]
    4: a place where arms are manufactured [syn: armory,
       armoury, arsenal]

Moby Thesaurus II by Grady Ward, 1.0:

255 Moby Thesaurus words for "armory":
   achievement, alerion, ammo dump, animal charge, annulet, archives,
   argent, armorial bearings, arms, arsenal, artillery park,
   assembly line, assembly plant, atomic arsenal, atomic energy plant,
   attic, azure, badge, badge of office, badges, bandeau, bank, bar,
   bar sinister, basement, baton, bay, bearings, bend, bend sinister,
   billet, bin, bindery, blazon, blazonry, boatyard, boilery,
   bonded warehouse, bookbindery, bookcase, bordure, box, brassard,
   brewery, brickyard, broad arrow, bunker, buttery, button,
   cadency mark, cannery, canton, cap and gown, cargo dock, cellar,
   chain, chain of office, chaplet, charge, chest, chevron, chief,
   class ring, closet, coat of arms, cockade, cockatrice, collar,
   conservatory, coronet, crate, creamery, crescent, crest, crib,
   cross, cross moline, crown, cupboard, dairy, decoration,
   defense plant, depository, depot, device, difference, differencing,
   distillery, dock, dockyard, drawer, dress, dump, eagle, emblems,
   ensigns, ermine, ermines, erminites, erminois, escutcheon,
   exchequer, factory, factory belt, factory district, falcon, fasces,
   feeder plant, fess, fess point, field, figurehead, file, flanch,
   fleur-de-lis, flour mill, fret, fur, fusil, garland, glory hole,
   godown, griffin, gules, gun park, gyron, hammer and sickle,
   hatchment, helmet, heraldic device, heraldry, hold, honor point,
   hutch, impalement, impaling, industrial park, industrial zone,
   inescutcheon, insignia, label, lapel pin, library, lion, livery,
   locker, lozenge, lumber room, lumberyard, mace, magasin, magazine,
   main plant, mantle, mantling, manufactory, manufacturing plant,
   manufacturing quarter, markings, marshaling, martlet, mascle,
   medal, metal, mill, mint, mortarboard, motto, mullet,
   munitions plant, nombril point, octofoil, oil refinery,
   old school tie, or, ordinary, orle, packing house, pale, paly,
   park, pean, pheon, pin, plant, pottery, power plant,
   production line, purpure, push-button plant, quarter, quartering,
   rack, refinery, regalia, repertory, repository, reservoir, rick,
   ring, rose, sable, saltire, sawmill, school ring, scutcheon,
   shamrock, shelf, shield, shipyard, sigillography,
   skull and crossbones, sphragistics, spread eagle, stack,
   stack room, staff, stock room, storage, store, storehouse,
   storeroom, subassembly plant, subordinary, sugar refinery,
   supply base, supply depot, swastika, tank, tannery, tartan, tenne,
   thistle, tie, tincture, torse, treasure house, treasure room,
   treasury, tressure, unicorn, uniform, vair, vat, vault, verge,
   vert, wand, warehouse, wine cellar, winery, wreath, yale, yard,
   yards