Assault and battery are different crimes, but they are related. Assault is when a person commits an act that may inflict physical harm on someone else. Similarly, battery is when a person actually commits an act that inflicts physical harm on another.
According to the internet, assult and battery is "the crime of threatening a person together with the act of making physical contact with them."
Another website tells us that assult is an act of physical violence against someone, while battery is the actual act of causing harm. I dont know if my paraphrasing made much sense, so heres the actual thing:
In an act of physical violence by one person against another, "assault" is usually paired with battery. In an act of physical violence, assault refers to the act which causes the victim to apprehend imminent physical harm, while battery refers to the actual act causing the physical harm.