ammo, ammunition - projectiles to be fired from a gun

armament - weaponry used by military or naval force

bomb - an explosive device fused to denote under specific conditions

defence system, defense system - the weaponry available for the defense of a region

gunnery - guns collectively

hardware - major items of military weaponry (as tanks or missile)

instrumentation, instrumentality - an artifact (or system of artifacts) that is instrumental in accomplishing some end

naval weaponry - weaponry for warships

weapon, weapon system, arm - any instrument or instrumentality used in fighting or hunting; "he was licensed to carry a weapon"

aggregation, collection, accumulation, assemblage - several things grouped together or considered as a whole

bastion - projecting part of a rampart or other fortification

bunker, dugout - a fortification of earth; mostly or entirely below ground

castle - a large building formerly occupied by a ruler and fortified against attack

defensive structure, defense, defence - a structure used for defense; "the artillery battered down the defenses"

defilade - the arrangement of defensive fortifications to protect against enemy fire

entrenchment, intrenchment - an entrenched fortification; a position protected by trenches

escarp, protective embankment, scarp, escarpment - a steep artificial slope in front of a fortification

fieldwork - a temporary fortification built by troops in the field

lunette - temporary fortification like a detached bastion

Maginot Line - a fortification built before World War II to protect France's eastern border; initially considered to be impregnable it was easily overrun by the Germans in 1940

palisade - fortification consisting of a strong fence made of stakes driven into the ground

breastwork, parapet - fortification consisting of a low wall

bulwark, rampart, wall - an embankment built around a space for defensive purposes; "they stormed the ramparts of the city"; "they blew the trumpet and the walls came tumbling down"

Siegfried line - German fortifications facing the Maginot Line

stockade - fortification consisting of a fence made of a line of stout posts set firmly for defense

arm - supply with arms; "The U.S. armed the freedom fighters in Afghanistan"