Sea of Marmora vs Marmora

Sea of Marmora and Marmora both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sea of Marmora	Yes	No	No	No
Marmora	Yes	No	No	No

As nouns, Sea of Marmora and Marmora are synonyms defined as:

Sea of Marmora and Marmora: an inland sea in northwestern Turkey; linked to the Black Sea by the Bosporus and linked to the Aegean by the Dardanelles

Other synonyms of Sea of Marmora include Marmara, Marmara Denizi, Sea of Marmara.

Sea of Marmora (noun)	Marmora (noun)
an inland sea in northwestern Turkey; linked to the Black Sea by the Bosporus and linked to the Aegean by the Dardanelles	an inland sea in northwestern Turkey; linked to the Black Sea by the Bosporus and linked to the Aegean by the Dardanelles