* Noun: This is the most common use. A hole is a physical opening or cavity in a solid object.
* Example: "I found a hole in my sock."
* Verb: Less common, but it can be used as a verb meaning to make a hole.
* Example: "The kids holed up in the fort to play."
* Adjective: This is even rarer, but it can be used as an adjective meaning "full of holes" or "having many holes".
* Example: "The cheese was quite holey."
So, without context, it's hard to say for sure what part of speech "hole" is.