sisterdom

sister +‎ -dom

sisterdom (uncountable)

1. sisterhood; the quality of being a sister
   • 2003, Susan Ouriou, Damselfish, page 25:

     But Faith's notebook — which I took for her coursework — was lying open on the coffee table. I picked it up out of sheer boredom. Instead of a linguistic treatise, I saw she'd written her self. Her anger at Mom. Her frustration with sisterdom.

   • 2007, Cheryl Dellasega, Forced to Be Family:

     Occasionally reminding someone of their obligations to the family may be part of the baggage of motherhood or sisterdom, but using this style of interaction to the point of excess or the discomfort of another is inappropriate.

• distomers, missorted