timeless existence vs beingness

timeless existence and beingness both are nouns.

Word	Noun	Adjective	Verb	Adverb
timeless existence	Yes	No	No	No
beingness	Yes	No	No	No

As nouns, beingness is a hypernym of timeless existence; that is, beingness is a word with a broader meaning than timeless existence:

timeless existence: a state of eternal existence believed in some religions to characterize the afterlife
beingness: the state or fact of existing

Other hypernyms of timeless existence include being, existence, face of the earth.

timeless existence (noun)	beingness (noun)
a state of eternal existence believed in some religions to characterize the afterlife	the state or fact of existing