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Sink

A bowl-shaped fixture in the kitchen that is used for washing up.

Hole

A hollow place in a solid body or surface. 

Sinkhole

A hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage.

Example Sentence:-

"If you are a homeowner in Florida, you may fear the day when a sinkhole suddenly appears on your property and swallows up your home."