What is the noun of treat?

The noun of "treat" can be either "treatment" or "treat" itself, depending on the context.

* Treatment: This refers to the act or process of treating something or someone.

* Example: "The doctor prescribed a new treatment for his illness."

* Treat: This can refer to a special thing that is enjoyable or rewarding.

* Example: "He gave his dog a special treat for being well-behaved."

So, the best noun form depends on what you are trying to say.