An arms store is a place where weapons and ammunition are stored. However, there are many synonyms for this term that are commonly used. Some of the most common synonyms for arms store include arsenal, armory, weapon repository, gun warehouse, gun depot, and ammunition depot. These words all refer to a place where weapons are kept in large quantities for military or other purposes. Other synonyms for arms store include gun store, firearm supplier, and military supply store. No matter which term is used, all of these words indicate a place where weapons are stored and can be acquired for use.