chaparral vs vegetation

chaparral and vegetation both are nouns.

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

As nouns, vegetation is a hypernym of chaparral; that is, vegetation is a word with a broader meaning than chaparral:

Other hypernyms of chaparral include botany, flora.

chaparral (noun)	vegetation (noun)
dense vegetation consisting of stunted trees or bushes	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