Anglesea vs Anglesey

Anglesea and Anglesey both are nouns.

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

As nouns, Anglesea and Anglesey are synonyms defined as:

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

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