Central American nation vs Central America

Central American nation and Central America both are nouns.

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

Central American nation (noun)	Central America (noun)
any one of the countries occupying Central America; these countries (except for Belize and Costa Rica) are characterized by low per capita income and unstable governments	the nations of Central America collectively
	the isthmus joining North America and South America; extends from the southern border of Mexico to the northern border of Colombia