armory, armoury, inventory -- (a collection of resources; "he dipped into his intellectual armory to find an answer")
arsenal, armory, armoury -- (all the weapons and equipment that a country has)
arsenal, armory, armoury -- (a military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms)
armory, armoury, arsenal -- (a place where arms are manufactured)