projectile vs rocket engine

projectile and rocket engine both are nouns.

Word	Noun	Adjective	Verb	Adverb
projectile	Yes	Yes	No	No
rocket engine	Yes	No	No	No

projectile (noun)	rocket engine (noun)
a weapon that is forcibly thrown or projected at a targets but is not self-propelled	a jet engine containing its own propellant and driven by reaction propulsion
any vehicle self-propelled by a rocket engine

projectile (adjective)	rocket engine (adjective)
impelling or impelled forward