Possible Clues:

• 'Sister Act' sisters
• Insurgents release tigers in the cloister
• Cloistered sisters
• Convent sisters
• Meryl Streep and Amy Adams played them in "Doubt"
• Meryl Streep and Amy Adams played them in 'Doubt'
• Bhikkhunis : Buddhist monastery :: ___ : convent
• Sisters in the 2017 film "The Little Hours"
• Those in a convent
• Letters on dreidels