rocket launcher vs launcher

rocket launcher and launcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
rocket launcher	Yes	No	No	No
launcher	Yes	No	No	No

As nouns, rocket launcher and launcher are synonyms defined as:

rocket launcher and launcher: armament in the form of a device capable of launching a rocket

rocket launcher (noun)	launcher (noun)
armament in the form of a device capable of launching a rocket	armament in the form of a device capable of launching a rocket
	a device that launches aircraft from a warship