8 letters · 15 points in Scrabble
noun a window above a door that is usually hinged to a horizontal crosspiece over the door
noun a window in a roof to admit daylight
noun a semicircular window over a door or window; usually has sash bars like the ribs of a fan
originFrom fan + light (“window; source of illumination”).
Etymology from Wiktionary, CC BY-SA 3.0