upbeat vs prosperity

upbeat and prosperity both are nouns.

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

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

Other hypernyms of upbeat include successfulness.

upbeat (noun)	prosperity (noun)
an unaccented beat (especially the last beat of a measure)	the condition of prospering; having good fortune
a contented state of being happy and healthy and prosperous	an economic state of growth with rising profits and full employment

upbeat (adjective)	prosperity (adjective)
pleasantly (even unrealistically) optimistic