intensiveness vs intensive

intensiveness and intensive both are nouns.

Word	Noun	Adjective	Verb	Adverb
intensiveness	Yes	No	No	No
intensive	Yes	Yes	No	No

intensiveness (noun)	intensive (noun)
high level or degree; the property of being intense	a modifier that has little meaning except to intensify the meaning it modifies

intensiveness (adjective)	intensive (adjective)
	of agriculture; intended to increase productivity of a fixed area by expending more capital and labor
	tending to give force or emphasis
	characterized by a high degree or intensity; often used as a combining form