What is another word for sis?
Pronunciation: [sˈɪs] (IPA) 
Sis is a colloquial term used to refer to a female sibling. However, there are other synonyms that are commonly used in different parts of the English-speaking world. In southern and eastern regions of the United States, for example, the term "sissy" is used to refer to a younger sister. Other alternatives include "sister," "sib," "sisseroo," "sisling," and "sista." Some may also use humorous terms like "sister-from-another-mister" or "sister/brother from another mother." Regardless of the word chosen, the affectionate use of such terms for siblings is a testament to the special bond shared by brothers and sisters.
