con·fra·ter·ni·ty 
(kŏn′frə-tûrnĭ-tē)
(kŏn′frə-tûrnĭ-tē)n. pl. con·fra·ter·ni·ties
An association of persons united in a common purpose or profession.
[Middle English confraternite, from Old French, from Medieval Latin cōnfrāternitās, from cōnfrāter, colleague; see CONFRERE.]