vegetation vs assemblage

vegetation and assemblage both are nouns.

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

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

Other hypernyms of vegetation include accumulation, aggregation, collection.

vegetation (noun)	assemblage (noun)
inactivity that is passive and monotonous, comparable to the inactivity of plant life	the social act of assembling
an abnormal growth or excrescence (especially a warty excrescence on the valves of the heart)	a system of components assembled together for a particular purpose
all the plant life in a particular region or period	a group of persons together in one place
the process of growth in plants	several things grouped together or considered as a whole