What part of speech is itch?

"Itch" can be a few different parts of speech, depending on its usage:

* Noun: When referring to the sensation itself, "itch" is a noun. For example: "I have an itch on my arm."

* Verb: When referring to the act of scratching or feeling the sensation, "itch" is a verb. For example: "My skin itches."

Let me know if you have a specific sentence in mind, and I can tell you which part of speech it is!