| Answer | Crossword Clue |
|---|---|
| flattest | FLAT, having a smooth level surface |
| flatly | FLAT, having a smooth level surface |
| planar | flat (having a smooth level surface) |
| flatten | to make flat (having a smooth level surface) |
| flattening | FLATTEN, to make flat (having a smooth level surface) |
| flattened | FLATTEN, to make flat (having a smooth level surface) |
| flattens | FLATTEN, to make flat (having a smooth level surface) |
| flat | to flatten (to make flat) / having a smooth level surface |
| flatness | the state of being flat (having a smooth level surface) |
| flatnesses | FLATNESS, the state of being flat (having a smooth level surface) |
