roar vs make noise

roar is a noun but make noise is not a noun.

Word	Noun	Adjective	Verb	Adverb
roar	Yes	No	Yes	No
make noise	No	No	Yes	No

As verbs, make noise is a hypernym of roar; that is, make noise is a word with a broader meaning than roar:

Other hypernyms of roar include noise, resound.

roar (noun)	make noise (noun)
a very loud utterance (like the sound of an animal)
a deep prolonged loud noise
the sound made by a lion

roar (verb)	make noise (verb)
laugh unrestrainedly and heartily	emit a noise
make a loud noise, as of wind, water, or vehicles
emit long loud cries
utter words loudly and forcefully
make a loud noise, as of animal
act or proceed in a riotous, turbulent, or disorderly way