substantiality vs substantialness

substantiality and substantialness both are nouns.

Word	Noun	Adjective	Verb	Adverb
substantiality	Yes	No	No	No
substantialness	Yes	No	No	No

As nouns, substantiality and substantialness are synonyms defined as:

substantiality and substantialness: the quality of being substantial or having substance

Other synonyms of substantiality include solidness.

substantiality (noun)	substantialness (noun)
the quality of being substantial or having substance	the quality of being substantial or having substance