bomb vs munition

bomb and munition both are nouns.

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

As nouns, munition is a hypernym of bomb; that is, munition is a word with a broader meaning than bomb:

Other hypernyms of bomb include explosive device, arms, implements of war, weaponry, weapons system.

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

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