munition vs bomb

munition and bomb both are nouns.

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

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

munition (noun)	bomb (noun)
weapons considered collectively	an explosive device fused to explode under specific conditions
defensive structure consisting of walls or mounds built around a stronghold to strengthen it	strong sealed vessel for measuring heat of combustion
military supplies	an event that fails badly or is totally ineffectual

munition (verb)	bomb (verb)
supply with weapons	throw bombs at or attack with bombs
	fail to get a passing grade