What is the noun form of verb noun?

There isn't a single noun form for the verb "verb". However, depending on the context, you could use several options:

* Verbification: This refers to the process of turning something into a verb.

* Verbalization: This refers to the act of expressing something verbally.

* Verb: This can sometimes be used as a noun to refer to the word itself, like "The word 'run' is a verb."

Ultimately, the best noun form to use will depend on the specific meaning you want to convey.