Central America vs American

Central America and American both are nouns.

Word	Noun	Adjective	Verb	Adverb
Central America	Yes	No	No	No
American	Yes	Yes	No	No

Central America (noun)	American (noun)
the nations of Central America collectively	the English language as used in the United States
the isthmus joining North America and South America; extends from the southern border of Mexico to the northern border of Colombia	a native or inhabitant of the United States
	a native or inhabitant of a North American or Central American or South American country

Central America (adjective)	American (adjective)
	of or relating to or characteristic of the continents and islands of the Americas
	of or relating to the United States of America or its people or language or culture