timelessness vs being

timelessness and being both are nouns.

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

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

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

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

timelessness (noun)	being (noun)
The property of not being restricted to a particular time or date.	a living thing that has (or can develop) the ability to act or function independently
a state of eternal existence believed in some religions to characterize the afterlife	the state or fact of existing