| Answer | Crossword Clue |
|---|---|
| BOILUP | Bubble to the surface |
| boiled | to bubble up and change into a gas as the result of heating |
| boiling | to bubble up and change into a gas as the result of heating |
| boils | to bubble up and change into a gas as the result of heating |
| boil | to bubble up and change into a gas as the result of heating |
| level | a device for establishing a horizontal line or plane by means of a bubble in a liquid that shows adjustment to the horizontal by movement to the center of a slightly bowed glass tube |
