Mobile Bay vs Golfo de Mexico

Mobile Bay and Golfo de Mexico both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mobile Bay	Yes	No	No	No
Golfo de Mexico	Yes	No	No	No

Mobile Bay (noun)	Golfo de Mexico (noun)
a bay of the Gulf of Mexico; fed by the Mobile River	an arm of the Atlantic to the south of the United States and to the east of Mexico