South America vs assemblage

South America and assemblage both are nouns.

Word	Noun	Adjective	Verb	Adverb
South America	Yes	No	No	No
assemblage	Yes	No	No	No

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

Other hypernyms of South America include accumulation, aggregation, collection.

South America (noun)	assemblage (noun)
the nations of the South American continent collectively	the social act of assembling
a continent in the western hemisphere connected to North America by the Isthmus of Panama	a system of components assembled together for a particular purpose
	a group of persons together in one place
	several things grouped together or considered as a whole