South America vs continent

South America and continent both are nouns.

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

South America (noun)	continent (noun)
the nations of the South American continent collectively	one of the large landmasses of the earth
a continent in the western hemisphere connected to North America by the Isthmus of Panama

South America (adjective)	continent (adjective)
	having control over urination and defecation
	abstaining from sexual intercourse