trough Synonyms

manger hod pothole rabbet ravine rut sewer shute sink sluice sluiceway pit pentrough penstock hole hollow hollowness hopper indentation kennel kier moat nadir socket spillway strath feed bunk raceway mineshaft entrenchment sinkhole bathyphase rain gutter rainy day public treasury gutters watercourse birdbath sulcus till tray trench vale valley waterer waterway air pocket cavitied feeding trough gutter