Buckeye State vs OH

Buckeye State and OH both are nouns.

Word	Noun	Adjective	Verb	Adverb
Buckeye State	Yes	No	No	No
OH	Yes	No	No	No

As nouns, Buckeye State and OH are synonyms defined as:

Buckeye State and OH: a midwestern state in north central United States in the Great Lakes region, with capital Columbus

Other synonyms of Buckeye State include Ohio.

Buckeye State (noun)	OH (noun)
a midwestern state in north central United States in the Great Lakes region, with capital Columbus	a midwestern state in north central United States in the Great Lakes region, with capital Columbus