discursiveness vs discursive

discursiveness is a noun but discursive is not a noun.

Word	Noun	Adjective	Verb	Adverb
discursiveness	Yes	No	No	No
discursive	No	Yes	No	No

discursiveness (noun)	discursive (noun)
the quality of being discursive

discursiveness (adjective)	discursive (adjective)
	(of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects
	proceeding to a conclusion by reason or argument rather than intuition