existence vs being

existence and being both are nouns.

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

As nouns, existence and being are synonyms defined as:

Other synonyms of existence include beingness, face of the earth.

existence (noun)	being (noun)
everything that exists anywhere	a living thing that has (or can develop) the ability to act or function independently
the state or fact of existing	the state or fact of existing