sister
n//ˈsɪs.tə(ɹ)//syster, sjuksyster, sjuksköterska, medsyster
A female member of a religious order; especially one devoted to more active service; (informally) a nun.
(British) A senior or supervisory nurse, often in a hospital.
Any woman or girl with whom a bond is felt through the same biological sex, gender or common membership in a community, race, profession, religion, organization, or ism.