Aunty
Part of speech: noun
Definition: The sister or sister-in-law of one’s parent. (slang) affectionate name for an older woman
Aunt
Part of speech: noun
Definition: a sister or sister-in-law of someone's parent(also great-aunt or grandaunt) a person's grandparent's sister or sister-in-law.(usually auntie) a grandmother.an affectionate term for a woman of an older generation than oneself, especially a friend of one's parents, by means of fictive kin.