prosperous vs well-off

prosperous and well-off both are adjectives.

Word	Noun	Adjective	Verb	Adverb
prosperous	No	Yes	No	No
well-off	No	Yes	No	No

As adjectives, prosperous and well-off are synonyms defined as:

prosperous and well-off: in fortunate circumstances financially; moderately rich

Other synonyms of prosperous include comfortable, easy, well-fixed, well-heeled, well-situated, well-to-do.

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