Keystone State vs Pa.

Keystone State and Pa. both are nouns.

Word	Noun	Adjective	Verb	Adverb
Keystone State	Yes	No	No	No
Pa.	Yes	No	No	No

As nouns, Keystone State and Pa. are synonyms defined as:

Keystone State and Pa.: a Mid-Atlantic state; one of the original 13 colonies, with capital Harrisburg

Other synonyms of Keystone State include PA, Pennsylvania.

Keystone State (noun)	Pa. (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Harrisburg	a Mid-Atlantic state; one of the original 13 colonies, with capital Harrisburg