Here are some other ways to call your sister in Tamil, depending on the context and relationship:
* "thangi" (தங்கை): This is used for younger sisters.
* "akkai" (அக்கை): This is a more informal and familiar term for older sisters.
* "sahodari" (சகோதரி): This is a more formal and literary term for sister.
* "sister" (சிஸ்டர்): You can also use the English word "sister" in Tamil.
The specific term you use will depend on your relationship with your sister, your age, and the social context.