Saint Brigid vs St. Bridget

Saint Brigid and St. Bridget both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Brigid	Yes	No	No	No
St. Bridget	Yes	No	No	No

As nouns, Saint Brigid and St. Bridget are synonyms defined as:

Saint Brigid and St. Bridget: Irish abbess; a patron saint of Ireland (453-523)

Other synonyms of Saint Brigid include Bride, Bridget, Brigid, Brigit of Kildare, Saint Bride, Saint Bridget, St. Bride, St. Brigid.

Saint Brigid (noun)	St. Bridget (noun)
Irish abbess; a patron saint of Ireland (453-523)	Irish abbess; a patron saint of Ireland (453-523)