substantival vs substantive

substantival is not a noun while substantive is a noun.

Word	Noun	Adjective	Verb	Adverb
substantival	No	Yes	No	No
substantive	Yes	Yes	No	No

substantival (noun)	substantive (noun)
	any word or group of words functioning as a noun

substantival (adjective)	substantive (adjective)
of or relating to or having the nature or function of a substantive (i.e. a noun or noun equivalent)	defining rights and duties as opposed to giving the rules by which rights and duties are established
	of or relating to the real nature or essential elements of something
	being on topic and prompting thought