Superioresses is an outdated term that refers to the female head of a religious community or order. There are several synonymous terms that can be used instead of superioresses, such as prioress, abbess, mother superior, and superior general. Prioress is specifically used in reference to the head of a convent of nuns or friars. Abbess is a term that refers to the head of an abbey of nuns. Mother superior is a term that is commonly used to refer to the female head of a convent or religious community. Superior general refers to the head of a religious order that includes both men and women. All of these terms are interchangeable and can be used to describe the same role.