| Answer | Crossword Clue |
|---|---|
| washboard | The surface of a worn, uneven road |
| washboards | The surface of a worn, uneven road |
| bumpiest | (of a surface) Uneven, with many patches raised above the rest |
| bumpy | (of a surface) Uneven, with many patches raised above the rest |
| saltations | The movement of hard particles such as sand over an uneven surface in a turbulent flow of air or water |
| frottages | The technique or process of taking a rubbing from an uneven surface to form the basis of a work of art |
