Tudor arch vs four-centered arch

Tudor arch and four-centered arch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tudor arch	Yes	No	No	No
four-centered arch	Yes	No	No	No

As nouns, Tudor arch and four-centered arch are synonyms defined as:

Tudor arch and four-centered arch: a low elliptical or pointed arch; usually drawn from four centers

Tudor arch (noun)	four-centered arch (noun)
a low elliptical or pointed arch; usually drawn from four centers	a low elliptical or pointed arch; usually drawn from four centers