Armament is a synonym of munitions.
As nouns the difference between armament and munitions
is that armament
is a body of forces equipped for war while munitions
Other Comparisons: What's the difference?
A body of forces equipped for war.
(military, naval) All the cannon and small arms collectively, with their equipments, belonging to a ship or a fortification.
Any equipment for resistance.
The process of building up military capacity.