Maryland vs MD

Maryland and MD both are nouns.

Word	Noun	Adjective	Verb	Adverb
Maryland	Yes	No	No	No
MD	Yes	No	No	No

As nouns, Maryland and MD are synonyms defined as:

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

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

Maryland (noun)	MD (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis	a doctor's degree in medicine
one of the British colonies that formed the United States, with capital Annapolis	a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis
	a licensed medical practitioner