transom window vs transom

transom window and transom both are nouns.

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

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

transom window and transom: a window above a door that is usually hinged to a horizontal crosspiece over the door

Other synonyms of transom window include fanlight.

transom window (noun)	transom (noun)
a window above a door that is usually hinged to a horizontal crosspiece over the door	a horizontal crosspiece across a window or separating a door from a window over it
	a window above a door that is usually hinged to a horizontal crosspiece over the door