| Answer | Crossword Clue |
|---|---|
| FIZZ | Opposite of flatness |
| PANCAKE | Symbol of flatness |
| flatnesses | FLATNESS, the state of being flat (having a smooth level surface) |
| planometer | an instrument for gauging or testing the flatness of a plane surface |
| planometers | PLANOMETER, an instrument for gauging or testing the flatness of a plane surface |
| kurtosis | the state or quality of flatness or peakedness of the curve describing a frequency distribution in the region about its mode |
