Hibernia vs island

Hibernia and island both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hibernia	Yes	No	No	No
island	Yes	No	No	No

Hibernia (noun)	island (noun)
an island comprising the republic of Ireland and Northern Ireland	a zone or area resembling an island
	a land mass (smaller than a continent) that is surrounded by water