Anglesea vs Anglesea Island

Anglesea and Anglesea Island both are nouns.

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

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

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

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