vegetative vs vegetation

vegetative is not a noun while vegetation is a noun.

Word	Noun	Adjective	Verb	Adverb
vegetative	No	Yes	No	No
vegetation	Yes	No	No	No

vegetative (noun)	vegetation (noun)
	inactivity that is passive and monotonous, comparable to the inactivity of plant life
	an abnormal growth or excrescence (especially a warty excrescence on the valves of the heart)
	all the plant life in a particular region or period
	the process of growth in plants

vegetative (adjective)	vegetation (adjective)
composed of vegetation or plants
of or relating to an activity that is passive and monotonous
(of reproduction) characterized by asexual processes
relating to involuntary bodily functions