Auricle is also a part of heart (something we studied in school). It is an ear-shaped muscular part that sticks out from the surface of each upper chamber atrium of the heart.
Oracle, on the other hand, is a person; such as, a priestess, through whom a god was believed to speak: “Some people from the past would go to a shrine so they could consult an oracle.”
Oracles are also regarded as symbols of knowledge and their advice are highly valued: “I knew him long before he became the oracle of philosophy.”