the state of being a sister.

a group of sisters, esp. of nuns or of female members of a church.

an organization of women with a common interest, as for social, charitable, business, or political purposes.

congenial relationship or companionship among women; mutual female esteem, concern, support, etc.

Usually, the sisterhood. the community or network of women who participate in or support feminism.

noun

bond , friendship , sisterly , sodality , sorority , unity