Cuban capital vs capital of Cuba

Cuban capital and capital of Cuba both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cuban capital	Yes	No	No	No
capital of Cuba	Yes	No	No	No

As nouns, Cuban capital and capital of Cuba are synonyms defined as:

Cuban capital and capital of Cuba: the capital and largest city of Cuba; located in western Cuba; one of the oldest cities in the Americas

Other synonyms of Cuban capital include Havana.

Cuban capital (noun)	capital of Cuba (noun)
the capital and largest city of Cuba; located in western Cuba; one of the oldest cities in the Americas	the capital and largest city of Cuba; located in western Cuba; one of the oldest cities in the Americas