substantialness vs substantial

substantialness is a noun but substantial is not a noun.

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

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

substantialness (adjective)	substantial (adjective)
	having substance or capable of being treated as fact; not imaginary
	of considerable importance, size, or worth
	of or relating to the real nature or essential elements of something
	having an abundant supply of money or possessions of value
	of good quality and condition; solidly built
	providing abundant nourishment