prosperity vs welfare

prosperity and welfare both are nouns.

Word	Noun	Adjective	Verb	Adverb
prosperity	Yes	No	No	No
welfare	Yes	No	No	No

As nouns, welfare is a hyponym of prosperity; that is, welfare is a word with a more specific, narrower meaning than prosperity:

Other hyponyms of prosperity include eudaemonia, eudaimonia, upbeat, well-being, wellbeing, strength, success.

prosperity (noun)	welfare (noun)
the condition of prospering; having good fortune	governmental provision of economic assistance to persons in need
an economic state of growth with rising profits and full employment	something that aids or promotes well-being
	a contented state of being happy and healthy and prosperous