Synonyms for brotherhood

noun

1. The quality or state of being brothers

   fellowship, consanguinity, fraternity, equality, kinship, intimacy, (blood) relationship, family connection, affiliation, association, society, common humanity, family, race, comradeship, camaraderie, friendship, amity, filiation, sibling rivalry.

2. A fraternal organization

   fraternity, secret society, order; see organization 3.