* توپ (Toop): This is the most common word for a ball, used for almost any kind of ball, such as a soccer ball, basketball, or tennis ball.
* گوی (Goy): This word is more formal and refers to a sphere or a ball-shaped object. It is less commonly used in everyday conversation.
* چوگان (Choogan): This refers specifically to a polo ball.
So, the best translation depends on the specific type of ball you're talking about.