Pitchhole and Sinkhole

Sinkhole and pitchhole are semantically related. In some cases you can replace term "Sinkhole" with "Pitchhole", this words are similar.

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

Pitchhole and sinkhole are semantically related. Sometimes you can replace term "Pitchhole" with "Sinkhole", this nouns are similar.