being vs subsistence

being and subsistence both are nouns.

Word	Noun	Adjective	Verb	Adverb
being	Yes	No	No	No
subsistence	Yes	No	No	No

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

being (noun)	subsistence (noun)
a living thing that has (or can develop) the ability to act or function independently	minimal (or marginal) resources for subsisting
the state or fact of existing	the state of existing in reality; having substance
	a means of surviving