preexistence vs being

preexistence and being both are nouns.

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

As nouns, being is a hypernym of preexistence; that is, being is a word with a broader meaning than preexistence:

Other hypernyms of preexistence include beingness, existence, face of the earth.

preexistence (noun)	being (noun)
existing in a former state or previous to something else	a living thing that has (or can develop) the ability to act or function independently
	the state or fact of existing