being vs timelessness

being and timelessness both are nouns.

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

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

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

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