roaring vs prosperous

roaring is a noun but prosperous is not a noun.

Word	Noun	Adjective	Verb	Adverb
roaring	Yes	Yes	No	Yes
prosperous	No	Yes	No	No

As adjectives, roaring and prosperous are synonyms defined as:

Other synonyms of roaring include booming, burgeoning, flourishing, palmy, prospering, thriving.

roaring (noun)	prosperous (noun)
a very loud utterance (like the sound of an animal)
a deep prolonged loud noise

roaring (adjective)	prosperous (adjective)
very lively and profitable	marked by peace and prosperity
	presaging or likely to bring good luck or a good outcome
	in fortunate circumstances financially; moderately rich
	very lively and profitable

roaring (adverb)	prosperous (adverb)
extremely