| Answer | Crossword Clue |
|---|---|
| upthrust | The upward force that a liquid or gas exerts on a body floating in it |
| upthrusts | The upward force that a liquid or gas exerts on a body floating in it |
| masses | The quantity of matter that a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field |
