the condition or quality of being a brother or brothers.

the quality of being brotherly; fellowship.

a fraternal or trade organization.

all those engaged in a particular trade or profession or sharing a common interest or quality.

the belief that all people should act with warmth and equality toward one another, regardless of differences in race, creed, nationality, etc.

noun

sisterhood

noun

affiliation , alliance , clan , clique , community , comradeship , confederacy , coterie , fellowship , fraternity , guild , kinship , league , society , union , association , club , gang , lodge , order , sodality