substantial vs solidness

substantial is not a noun while solidness is a noun.

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

substantial (noun)	solidness (noun)
	the quality of being substantial or having substance
	the quality of being solid and reliable financially or factually or morally
	the consistency of a solid
	the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape

substantial (adjective)	solidness (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