intensive vs a great deal

intensive is a noun but a great deal is not a noun.

Word	Noun	Adjective	Verb	Adverb
intensive	Yes	Yes	No	No
a great deal	No	No	No	Yes

intensive (noun)	a great deal (noun)
a modifier that has little meaning except to intensify the meaning it modifies

intensive (adjective)	a great deal (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

intensive (adverb)	a great deal (adverb)
	to a very great degree or extent
	frequently or in great quantities