South American nation vs Federative Republic of Brazil

South American nation and Federative Republic of Brazil both are nouns.

Word	Noun	Adjective	Verb	Adverb
South American nation	Yes	No	No	No
Federative Republic of Brazil	Yes	No	No	No

South American nation (noun)	Federative Republic of Brazil (noun)
any one of the countries occupying the South American continent	the largest Latin American country and the largest Portuguese speaking country in the world; located in the central and northeastern part of South America; world's leading coffee exporter