Republic of Guinea vs French Guinea

Republic of Guinea and French Guinea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of Guinea	Yes	No	No	No
French Guinea	Yes	No	No	No

As nouns, Republic of Guinea and French Guinea are synonyms defined as:

Republic of Guinea and French Guinea: a republic in western Africa on the Atlantic; formerly a French colony; achieved independence from France in 1958

Other synonyms of Republic of Guinea include Guinea.

Republic of Guinea (noun)	French Guinea (noun)
a republic in western Africa on the Atlantic; formerly a French colony; achieved independence from France in 1958	a republic in western Africa on the Atlantic; formerly a French colony; achieved independence from France in 1958