There are several synonyms for the term "religious sisters" that describe women living in a religious community and dedicating themselves to serve others. One such synonym is "nuns," which specifically refers to women who live in a cloistered community and take vows of poverty, chastity, and obedience. Another synonym is "sisters of charity," which refers to women who are part of a religious order that focuses on serving the sick, poor, and marginalized. Additionally, the term "female religious" can be used to refer to women who have taken vows and dedicated themselves to a life of spiritual service. Finally, the term "convent sisters" can be used to describe women who live in a convent and belong to a religious order.