Novaya Zemlya vs island

Novaya Zemlya and island both are nouns.

Word	Noun	Adjective	Verb	Adverb
Novaya Zemlya	Yes	No	No	No
island	Yes	No	No	No

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