substantial vs substance

substantial is not a noun while substance is a noun.

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

substantial (noun)	substance (noun)
	the real physical matter of which a person or thing consists
	a particular kind or species of matter with uniform properties
	the property of holding together and retaining its shape
	the idea that is intended
	the choicest or most essential or most vital part of some idea or experience
	content communicating a message; what something is about
	considerable capital (wealth or income)
	material of a particular kind or constitution

substantial (adjective)	substance (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