Tar Heel State vs Old North State

Tar Heel State and Old North State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tar Heel State	Yes	No	No	No
Old North State	Yes	No	No	No

As nouns, Tar Heel State and Old North State are synonyms defined as:

Tar Heel State and Old North State: a state in southeastern United States; one of the original 13 colonies

Other synonyms of Tar Heel State include N.C., NC, North Carolina.

Tar Heel State (noun)	Old North State (noun)
a state in southeastern United States; one of the original 13 colonies	a state in southeastern United States; one of the original 13 colonies