Republic of Cameroon vs Cameroun

Republic of Cameroon and Cameroun both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of Cameroon	Yes	No	No	No
Cameroun	Yes	No	No	No

As nouns, Republic of Cameroon and Cameroun are synonyms defined as:

Republic of Cameroon and Cameroun: a republic on the western coast of central Africa; was under French and British control until 1960

Other synonyms of Republic of Cameroon include Cameroon.

Republic of Cameroon (noun)	Cameroun (noun)
a republic on the western coast of central Africa; was under French and British control until 1960	a republic on the western coast of central Africa; was under French and British control until 1960