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Valid in Scrabble US · 15 points
2 synonyms in 1 meaning · 1 playable in Scrabble US
a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
Also: swallow hole.
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Dictionary: official Scrabble dictionary (US), UK Scrabble Dictionary, Words with Friends ENABLE