transom /tranˈsəm/

1. A structure dividing a window horizontally
2. A lintel
3. (also transom window) a small window over the lintel of a door or window
4. A crosspiece
5. A crossbeam
6. Any of several crossbeams used to strengthen the stern of a vessel

• ballpoint pen
• ballpoint pens
• ballpoints
• ball-proof
• ball rolling
• ballroom
• ballroom dancing
• ballrooms
• balls
• balls-aching
• ballsed-up
• ballsier
• ballsiest
• ballsiness
• ballsinesses
• balls-out
• balls up
• balls-up
• ballsy
• ball up
• ballup
• ball valve
• ball valves
• bally
• ballyhoo