| Rating | Solver | Clue |
|---|---|---|
| BASIN | Sink hole | |
| DRAIN | Sink hole | |
| SINK | A hole or low place in land or rock, where waters sink and are lost; -- called also sink hole. | |
| BORE | ... boring instrument; to cut a circular hole by the rotary motion of a tool; as, to bore for water or oil (i. e., to sink a well by boring for wat... |