indigestibleness vs indigestibility

indigestibleness and indigestibility both are nouns.

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

As nouns, indigestibleness and indigestibility are synonyms defined as:

indigestibleness and indigestibility: the property of being difficult to digest

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