Chile vs Republic of Chile

Chile and Republic of Chile both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chile	Yes	No	No	No
Republic of Chile	Yes	No	No	No

As nouns, Chile and Republic of Chile are synonyms defined as:

Chile and Republic of Chile: a republic in southern South America on the western slopes of the Andes on the south Pacific coast

Chile (noun)	Republic of Chile (noun)
a republic in southern South America on the western slopes of the Andes on the south Pacific coast	a republic in southern South America on the western slopes of the Andes on the south Pacific coast