Lone-Star State vs Southwest

Lone-Star State and Southwest both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lone-Star State	Yes	No	No	No
Southwest	Yes	No	No	No

Lone-Star State (noun)	Southwest (noun)
the second largest state; located in southwestern United States on the Gulf of Mexico	the southwestern region of the United States generally including New Mexico, Arizona, Texas, California, and sometimes Utah and Colorado