arsenalnouna store of weapons and ammunition.
a military establishment where weapons and ammunition are made and stored.
Origin
C16 (in the sense 'a dockyard'): from Fr., or from obs. Ital.arzanale, based on Arab.dār-aṛ-ṛināʽa, fromdār'house' +al-'(of) the' +sināʽa'art, industry'.
Thesaurusarsenalnoun
1Britain's nuclear arsenal: WEAPONS, weaponry, arms, armaments.
2mutineers broke into the arsenal: ARMOURY, arms depot, arms cache, ordnance depot, magazine, ammunition dump.