munition vs bastion

munition and bastion both are nouns.

Word	Noun	Adjective	Verb	Adverb
munition	Yes	No	Yes	No
bastion	Yes	No	No	No

As nouns, bastion is a hyponym of munition; that is, bastion is a word with a more specific, narrower meaning than munition:

munition: defensive structure consisting of walls or mounds built around a stronghold to strengthen it
bastion: projecting part of a rampart or other fortification

munition (noun)	bastion (noun)
weapons considered collectively	projecting part of a rampart or other fortification
defensive structure consisting of walls or mounds built around a stronghold to strengthen it	a stronghold into which people could go for shelter during a battle
military supplies	a group that defends a principle

munition (verb)	bastion (verb)
supply with weapons