weapons system vs bomb

weapons system and bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
weapons system	Yes	No	No	No
bomb	Yes	No	Yes	No

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

Other hyponyms of weapons system include ammo, ammunition, armament, defence system, defense system, gunnery, hardware, naval weaponry.

weapons system (noun)	bomb (noun)
weapons considered collectively	an explosive device fused to explode under specific conditions
	strong sealed vessel for measuring heat of combustion
	an event that fails badly or is totally ineffectual

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