Convents

3 clues
Buildings with cells
Mothers oversee them
Sisters' accommodations
Similar answers:
Abasements
Abatements
Absents
Abutments
Accents
Accentshappen
Accentswillhappen
Accidents
Accidentsarewaiting
Accidentshappen
Accomplishments
Accoutrements
Acquiescents
Adddetergents
Addonestwocents
Adepartmentstoreandhe
Adherents
Adjustments
Adolescents
Adornments