oriel vs oriel window

oriel and oriel window both are nouns.

Word	Noun	Adjective	Verb	Adverb
oriel	Yes	No	No	No
oriel window	Yes	No	No	No

As nouns, oriel and oriel window are synonyms defined as:

oriel and oriel window: a projecting bay window corbeled or cantilevered out from a wall

oriel (noun)	oriel window (noun)
a projecting bay window corbeled or cantilevered out from a wall	a projecting bay window corbeled or cantilevered out from a wall