IPA: //ˈmuːnruːf//
KK: /ˈmunˌruf/
A type of sunroof made of clear glass that allows light to enter a vehicle even when it is closed.
The new car model features a moonroof that lets in plenty of natural light.
Moonroof → The word is formed from "moon" (from Old English *mōna*, meaning the natural satellite of Earth) and "roof" (from Old English *hrof*, meaning the top covering of a building). A moonroof refers to a roof that allows light from the moon to enter, typically a glass panel in a car roof.
Think of the 'moon' shining down and a 'roof' that lets that light in — that's what a moonroof does.
No commonly confused words.