Southern Ocean vs Antarctic Ocean

Southern Ocean and Antarctic Ocean both are nouns.

Word	Noun	Adjective	Verb	Adverb
Southern Ocean	Yes	No	No	No
Antarctic Ocean	Yes	No	No	No

As nouns, Southern Ocean and Antarctic Ocean are synonyms defined as:

Southern Ocean and Antarctic Ocean: the southern waters surrounding Antarctica

Southern Ocean (noun)	Antarctic Ocean (noun)
the southern waters surrounding Antarctica	the southern waters surrounding Antarctica