"brotherhoods" in the noun sense
1. brotherhood
the kinship relation between a male offspring and the siblings
2. brotherhood, fraternity, sodality
people engaged in a particular occupation
"the medical fraternity"
3. brotherhood
the feeling that men should treat one another like brothers
4. union, labor union, trade union, trades union, brotherhood
an organization of employees formed to bargain with the employer
"you have to join the union in order to get a job"
Source: WordNet® (An amazing lexical database of English)
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