broth·er·hood
 /ˈbrʌðɚˌhʊd/  noun  ,  pl   -hoods
  1 [  noncount  ] : feelings of friendship, support, and understanding between people
   the brotherhood of humankind
  2 [  count  ] : a group or organization of people who have the same interests, jobs, etc.
   the musical brotherhood
  — often used in the names of labor unions
   the International Brotherhood of Electrical Workers