Washery/Wash plant - A gold or coal cleaning plant in which water or other liquid is used to remove dirt by differences in density.
Water table - The upper limit or surface of the groundwater which follows approximately the profile of the land-surface.
Winder - The engine at the top of a shaft which rotates the winding drum and thus hoists and lowers the cage or skip by means of a winding rope.
Winze - An underground opening similar to a shaft but not starting at the surface.