Sea of Azoff vs Sea of Azov

Sea of Azoff and Sea of Azov both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sea of Azoff	Yes	No	No	No
Sea of Azov	Yes	No	No	No

As nouns, Sea of Azoff and Sea of Azov are synonyms defined as:

Sea of Azoff and Sea of Azov: a bay of the Black Sea between Russia and the Ukraine

Other synonyms of Sea of Azoff include Sea of Azof.

Sea of Azoff (noun)	Sea of Azov (noun)
a bay of the Black Sea between Russia and the Ukraine	a bay of the Black Sea between Russia and the Ukraine