Old Line State vs Maryland

Old Line State and Maryland both are nouns.

Word	Noun	Adjective	Verb	Adverb
Old Line State	Yes	No	No	No
Maryland	Yes	No	No	No

As nouns, Old Line State and Maryland are synonyms defined as:

Old Line State and Maryland: a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis

Other synonyms of Old Line State include Free State, Md., MD.

Old Line State (noun)	Maryland (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis	a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis
	one of the British colonies that formed the United States, with capital Annapolis