| Answer | Crossword Clue |
|---|---|
| oculi | circular opening at the top of a dome |
| oculus | circular opening, esp. one at the apex of a dome |
| oculi | circular opening, esp. one at the apex of a dome |
| oubliette | (French) a dungeon with an opening only at the top |
| oubliettes | OUBLIETTE, (French) a dungeon with an opening only at the top |
| funnels | A tube or pipe that is wide at the top and narrow at the bottom, used for guiding liquid or powder into a small opening |
