substantial vs substantialness

substantial is not a noun while substantialness is a noun.

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

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

substantial (adjective)	substantialness (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