the headliner or roof
Dome light
The "dome" is the light on the ceiling of your car. It is called a dome because this light is usually shaped like a dome.
The window in a ceiling or roof is called a Skylight.
Ceiling Mount Traverse Rod
Centrifugal force is observed in a ceiling fan. Thrust force is what moves a car moving on the road.
The line where the ceiling meets the wall is called a cornice. A cornice can be set off from the ceiling with the use of cornice trim. The line where the wall meets the floor is called a baseboard.
The architectural term is "vault"; some call it a cathedral ceiling.
Your head will be touching the ceiling
change the headlining
because your mom hates you
A sky light
oubliette