withered vs vegetation

withered is not a noun while vegetation is a noun.

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

withered (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

withered (adjective)	vegetation (adjective)
(used especially of vegetation) having lost all moisture
lean and wrinkled by shrinkage as from age or illness