Gulf Coast of the United States vs Lone-Star State

Gulf Coast of the United States and Lone-Star State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gulf Coast of the United States	Yes	No	No	No
Lone-Star State	Yes	No	No	No

Gulf Coast of the United States (noun)	Lone-Star State (noun)
a region of the United States comprising states bordering the Gulf of Mexico; Alabama and Florida and Louisiana and Mississippi and Texas	the second largest state; located in southwestern United States on the Gulf of Mexico