Saint Dominic vs Domingo de Guzman

Saint Dominic and Domingo de Guzman both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Dominic	Yes	No	No	No
Domingo de Guzman	Yes	No	No	No

As nouns, Saint Dominic and Domingo de Guzman are synonyms defined as:

Saint Dominic and Domingo de Guzman: (Roman Catholic Church) Spanish priest who founded an order whose members became known as Dominicans or Black Friars (circa 1170-1221)

Other synonyms of Saint Dominic include Dominic, St. Dominic.

Saint Dominic (noun)	Domingo de Guzman (noun)
(Roman Catholic Church) Spanish priest who founded an order whose members became known as Dominicans or Black Friars (circa 1170-1221)	(Roman Catholic Church) Spanish priest who founded an order whose members became known as Dominicans or Black Friars (circa 1170-1221)