existence vs presence

existence and presence both are nouns.

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

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

existence (noun)	presence (noun)
everything that exists anywhere	the act of being present
the state or fact of existing	dignified manner or conduct
	the impression that something is present
	the immediate proximity of someone or something
	an invisible spiritual being felt to be nearby
	the state of being present; current existence