island vs Nova Zembla

island and Nova Zembla both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
Nova Zembla	Yes	No	No	No

island (noun)	Nova Zembla (noun)
a zone or area resembling an island	two islands in the Arctic Ocean belonging to Russia; site of a test center for nuclear warheads
a land mass (smaller than a continent) that is surrounded by water