Gold Coast vs Republic of Ghana

Gold Coast and Republic of Ghana both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gold Coast	Yes	No	No	No
Republic of Ghana	Yes	No	No	No

As nouns, Gold Coast and Republic of Ghana are synonyms defined as:

Gold Coast and Republic of Ghana: a republic in West Africa on the Gulf of Guinea

Other synonyms of Gold Coast include Ghana.

Gold Coast (noun)	Republic of Ghana (noun)
a republic in West Africa on the Gulf of Guinea	a republic in West Africa on the Gulf of Guinea