Belgian Congo vs Congo

Belgian Congo and Congo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Belgian Congo	Yes	No	No	No
Congo	Yes	No	No	No

As nouns, Belgian Congo and Congo are synonyms defined as:

Belgian Congo and Congo: a republic in central Africa; achieved independence from Belgium in 1960

Other synonyms of Belgian Congo include Democratic Republic of the Congo, Zaire.

Belgian Congo (noun)	Congo (noun)
a republic in central Africa; achieved independence from Belgium in 1960	a republic in central Africa; achieved independence from Belgium in 1960
	a republic in west-central Africa; achieved independence from France in 1960
	a major African river (one of the world's longest); flows through Congo into the South Atlantic