Sea of Azov vs Sea of Azoff

Sea of Azov and Sea of Azoff both are nouns.

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

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

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

Other synonyms of Sea of Azov include Sea of Azof.

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