aunt vs auntie

aunt and auntie both are nouns.

Word	Noun	Adjective	Verb	Adverb
aunt	Yes	No	No	No
auntie	Yes	No	No	No

As nouns, aunt and auntie are synonyms defined as:

aunt and auntie: the sister of your father or mother; the wife of your uncle

Other synonyms of aunt include aunty.

aunt (noun)	auntie (noun)
the sister of your father or mother; the wife of your uncle	the sister of your father or mother; the wife of your uncle