This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A natural depression in a land surface communicating with a subterranean passage, generally occurring in limestone regions and formed by solution or by collapse of a cavern roof.

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

n. A depressed area in which waste or drainage collects.

n. A hole in the playfield that rewards the player when the ball is guided into it.

n. a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof

"A sinkhole is a natural depression caused by the removal of soil by water."

natural depression    depression   

shakehole    cenote    sink    dolina    doline   

inbreeding    directa    escarpment    caldera    gas jet    amphitheater    bayou    smoothbore    netgear    nightscape