Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sinkhole

1 sense of sinkhole

Sense 1
sinkhole, sink, swallow hole -- (a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof)
       => natural depression, depression -- (a sunken or depressed geological formation)

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