Saint Maarten vs St. Martin

Saint Maarten and St. Martin both are nouns.

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

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

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

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

Saint Maarten (noun)	St. 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
	French bishop who is a patron saint of France (died in 397)