Vermont vs Green Mountain State

Vermont and Green Mountain State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vermont	Yes	No	No	No
Green Mountain State	Yes	No	No	No

As nouns, Vermont and Green Mountain State are synonyms defined as:

Vermont and Green Mountain State: a state in New England with capital Montpelier

Other synonyms of Vermont include Vt., VT.

Vermont (noun)	Green Mountain State (noun)
a state in New England with capital Montpelier	a state in New England with capital Montpelier