upbeat vs health

upbeat and health both are nouns.

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

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

Other hyponyms of upbeat include fool's paradise, wellness.

upbeat (noun)	health (noun)
an unaccented beat (especially the last beat of a measure)	a healthy state of wellbeing free from disease
a contented state of being happy and healthy and prosperous	the general condition of body and mind

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