BROTHERHOOD...

brotherhood [ˈbrʌðəˌhʊd]
n
1. (Life Sciences & Allied Applications / Genetics) the state of being related as a brother or brothers
2. an association or fellowship, such as a trade union
3. (Business / Industrial Relations & HR Terms) all persons engaged in a particular profession, trade, etc
4. (Christianity / Ecclesiastical Terms) the belief, feeling, or hope that all men should regard and treat one another as brothers