Here are some ways to say grandpa in Italian:
* Nonno: The most common and formal way to say grandpa.
* Papà: Can also be used for grandpa, especially if the grandfather is still very much like a father figure.
* Babbo: Another word for grandpa, but less common than "nonno."
* Nonnino: A more affectionate way to say grandpa, similar to "grandpa" in English.
* Nono: A shortened and informal version of "nonno."
Important note: The best way to refer to your grandpa in Italian depends on your relationship with him and the context. "Nonno" is always safe, while other terms might be more appropriate depending on your personal connection.