St. Maarten vs Saint Martin

St. Maarten and Saint Martin both are nouns.

Word	Noun	Adjective	Verb	Adverb
St. Maarten	Yes	No	No	No
Saint Martin	Yes	No	No	No

As nouns, St. Maarten and Saint Martin are synonyms defined as:

St. Maarten and Saint Martin: an island in the western Leeward Islands; administered jointly by France and the Netherlands

Other synonyms of St. Maarten include Saint Maarten, Sint Maarten, St. Martin.

St. Maarten (noun)	Saint Martin (noun)
an island in the western Leeward Islands; administered jointly by France and the Netherlands	an island in the western Leeward Islands; administered jointly by France and the Netherlands