Find Synonyms
sis Synonyms
Another word for sis
Choosing another word for sis that fits your sentence is easier when synonyms and similar words are paired with an exact noun definition and ranked by match strength.
• noun (Context 1)
An informal or affectionate term for one's sister, or a familiar form of address for a close female friend.
Usage Example
"My little sister is graduating from high school next month."
Strongest
sister
Strong
sissy
sibling
Weak
girlfriend
Opposites of sis
The opposite of sis shifts depending on context. Common opposites include:
bro
brother
Cite this Entry
Wordmom. (2026). Synonyms for Sis. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/sis