launcher vs rocket launcher

launcher and rocket launcher both are nouns.

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

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

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

launcher (noun)	rocket 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