What's the word for the cave beside the wooden character?

Two views are suggested: one is the word "tree hole" and the other is the word created by merchants.

First, the wooden character department: I didn't find this word.

Second, common sentences

Because of the cave characters, the most common ones are earth caves, grottoes, caves, or places where people and things gather, such as gambling caves and slums.

There are also tree holes, but it seems to be more used in snake holes, ant holes, rabbit holes and so on.

Third, variant query

After checking the word "hole", the variant characters are as follows.

These include dictionaries, three-character learning corrections, a new version of flat-panel characters, a Chinese dictionary, a Chinese dictionary, Longdong notes, and an ocean of Chinese characters.

It may not be exhaustive, but it is not found in many dictionaries.

So it is suggested to treat it as three words or a new word.