welfare vs prosperity

welfare and prosperity both are nouns.

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

As nouns, prosperity is a hypernym of welfare; that is, prosperity is a word with a broader meaning than welfare:

Other hypernyms of welfare include successfulness.

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