| Answer | Crossword Clue |
|---|---|
| KNURL | Small ridge, as on a thumbscrew. |
| KNURLS | Small ridges, as on a thumbscrew. |
| KNURL | Ridge on a thumbscrew |
| KNURL | Small ridge on the edge of a button or dial |
| EARLET | Small projection, as on a leaf. |
| AREOLE | Small opening, as on a cactus |
