shrubbery vs vegetation

shrubbery and vegetation both are nouns.

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

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

Other hypernyms of shrubbery include botany, flora.

shrubbery (noun)	vegetation (noun)
a collection of shrubs growing together	inactivity that is passive and monotonous, comparable to the inactivity of plant life
an area where a number of shrubs are planted	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