Which pair gives the usual titles for the head of a monastery and the head of a convent?

Erklärung

The head of a house of monks and the head of a house of nuns each governed their community, its discipline and its lands, and each had a title of their own within the monastic order rather than within the diocesan clergy. Naming a prior instead fails because that title normally belonged to a deputy or to the head of a smaller dependent house, not to the head of a full abbey.