* Бабушка (babushka) - This is the most common word for grandmother, and it refers to both maternal and paternal grandmothers.
* Мама (mama) - While this word literally means "mother," it's often used to refer to your grandmother on your mother's side.
* Папа (papa) - Similarly, this word, meaning "father," can be used to refer to your grandmother on your father's side.
It's important to note that using "mama" and "papa" to refer to your grandmother is less formal and more common in informal settings.