ephemerality vs ephemeralness

ephemerality and ephemeralness both are nouns.

Word	Noun	Adjective	Verb	Adverb
ephemerality	Yes	No	No	No
ephemeralness	Yes	No	No	No

As nouns, ephemerality and ephemeralness are synonyms defined as:

ephemerality and ephemeralness: the property of lasting for a very short time

Other synonyms of ephemerality include fleetingness.

ephemerality (noun)	ephemeralness (noun)
the property of lasting for a very short time	the property of lasting for a very short time