Galveston Bay vs Golfo de Mexico

Galveston Bay and Golfo de Mexico both are nouns.

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

Galveston Bay (noun)	Golfo de Mexico (noun)
an arm of the Gulf of Mexico in Texas to the south of Houston	an arm of the Atlantic to the south of the United States and to the east of Mexico