Gulf of St. Lawrence vs Atlantic Ocean

Gulf of St. Lawrence and Atlantic Ocean both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gulf of St. Lawrence	Yes	No	No	No
Atlantic Ocean	Yes	No	No	No

Gulf of St. Lawrence (noun)	Atlantic Ocean (noun)
an arm of the northwest Atlantic Ocean off the southeastern coast of Canada	the 2nd largest ocean; separates North and South America on the west from Europe and Africa on the east