test rocket vs projectile

test rocket and projectile both are nouns.

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

As nouns, projectile is a hypernym of test rocket; that is, projectile is a word with a broader meaning than test rocket:

Other hypernyms of test rocket include rocket.

test rocket (noun)	projectile (noun)
a rocket fired for test purposes	a weapon that is forcibly thrown or projected at a targets but is not self-propelled
	any vehicle self-propelled by a rocket engine

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