Mass. vs Old Colony

Mass. and Old Colony both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mass.	Yes	No	No	No
Old Colony	Yes	No	No	No

As nouns, Mass. and Old Colony are synonyms defined as:

Mass. and Old Colony: a state in New England, with capital Boston; one of the original 13 colonies

Other synonyms of Mass. include Bay State, MA, Massachusetts.

Mass. (noun)	Old Colony (noun)
a state in New England, with capital Boston; one of the original 13 colonies	a state in New England, with capital Boston; one of the original 13 colonies