brotherhood

noun4

1. •
   The state of being brothers or a brother (also figuratively).
2. •
   An association of people for any purpose, such as a society of monks; a fraternity.

   • James formed a kind of brotherhood for ex-pats who were working in Valencia.
3. •
   All the people engaged in the same business, especially those of the same profession
4. •
   People, or (poetically) things, of the same kind.

   • a brotherhood of venerable trees — 1800