vegetation vs collection

vegetation and collection both are nouns.

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

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

Other hypernyms of vegetation include accumulation, aggregation, assemblage.

vegetation (noun)	collection (noun)
inactivity that is passive and monotonous, comparable to the inactivity of plant life	the act of gathering something together
an abnormal growth or excrescence (especially a warty excrescence on the valves of the heart)	a publication containing a variety of works
all the plant life in a particular region or period	request for a sum of money
the process of growth in plants	several things grouped together or considered as a whole