South America vs America

South America and America both are nouns.

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

South America (noun)	America (noun)
the nations of the South American continent collectively	North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
a continent in the western hemisphere connected to North America by the Isthmus of Panama	North America and South America and Central America