Tati is a word that has multiple meanings depending on the context in which it is used. As a synonym for "aunt," some synonyms could include "aunty," "auntie," or "tante" in other languages. As a nickname for "Tatiana," some synonyms could include "Tania," "Tanya," or "Tatia." In Brazilian Portuguese, "tati" could also refer to a type of sandal known as "tamanco." Additionally, in Japanese, "tati" is a word that means "stand" or "scaffold," making it a potential synonym for those words in that language. Regardless of the meaning, it is clear that the word "tati" can have many different synonyms depending on the context.