indigestibility vs indigestibleness

indigestibility and indigestibleness both are nouns.

Word	Noun	Adjective	Verb	Adverb
indigestibility	Yes	No	No	No
indigestibleness	Yes	No	No	No

As nouns, indigestibility and indigestibleness are synonyms defined as:

indigestibility and indigestibleness: the property of being difficult to digest

indigestibility (noun)	indigestibleness (noun)
the property of being difficult to digest	the property of being difficult to digest