What is another word for Sink-hole?
Pronunciation: [sˈɪŋkhˈə͡ʊl] (IPA) 
A sink-hole is a geological term used to describe a depression or hole that forms in the ground due to the collapse of the underlying soil or rock. The term is commonly used in areas where the ground is made up of soluble rock or bedrock, such as limestone. Synonyms for sink-hole include pothole, depression, cavity, fissure, crater, hollow, and chasm. Sink-holes can vary in size from just a few centimeters to several meters wide and can have dangerous consequences if they occur in urban areas. It is important to be aware of the signs of a potential sink-hole and to take precautions to prevent accidents.
