Anglesea Island vs Anglesey Island

Anglesea Island and Anglesey Island both are nouns.

Word	Noun	Adjective	Verb	Adverb
Anglesea Island	Yes	No	No	No
Anglesey Island	Yes	No	No	No

As nouns, Anglesea Island and Anglesey Island are synonyms defined as:

Anglesea Island and Anglesey Island: an island to the northwest of Wales

Other synonyms of Anglesea Island include Anglesea, Anglesey, Mona.

Anglesea Island (noun)	Anglesey Island (noun)
an island to the northwest of Wales	an island to the northwest of Wales