fanlight vs transom

fanlight and transom both are nouns.

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

As nouns, fanlight and transom are synonyms defined as:

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

Other synonyms of fanlight include transom window.

fanlight (noun)	transom (noun)
a semicircular window over a door or window; usually has sash bars like the ribs of a fan	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	a window above a door that is usually hinged to a horizontal crosspiece over the door
a window in a roof to admit daylight