Dahomey vs Republic of Benin

Dahomey and Republic of Benin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dahomey	Yes	No	No	No
Republic of Benin	Yes	No	No	No

As nouns, Dahomey and Republic of Benin are synonyms defined as:

Dahomey and Republic of Benin: a country on western coast of Africa; formerly under French control

Other synonyms of Dahomey include Benin.

Dahomey (noun)	Republic of Benin (noun)
a country on western coast of Africa; formerly under French control	a country on western coast of Africa; formerly under French control