1. (n.) The state or quality of being fraternal or brotherly; brotherhood.

2. (n.) A body of men associated for their common interest, business, or pleasure; a company; a brotherhood; a society; in the Roman Catholic Church, an association for special religious purposes, for relieving the sick and destitute, etc.

3. (n.) Men of the same class, profession, occupation, character, or tastes.

affiliation agnation alignment alliance amalgamation ancestry association blood blood relationship boon companionship brotherhood brotherliness brothership cahoots camaraderie chumship circle clan clannishness clique closeness club coadunation coalescence coalition cognation colleagueship collegialism collegiality combination common ancestry common descent community community of interest companionship company comradeship confederacy confederation confraternity confrerie connection consanguinity consociation consolidation consortship cooperation copartnership copartnery coterie country club cousinhood cousinship crowd enation esprit de corps fatherhood federation fellowship filiation fraternal order fraternalism fraternization freemasonry friendship fusion guild hookup inclusion incorporation integration kindred kinship league maternity matrilineage matriliny matrisib matrocliny membership merger motherhood order partaking participation partnership paternity patrilineage patriliny patrisib patrocliny propinquity relatedness relation relationship secret society set sharing sibship sisterhood sisterliness sistership society sodality solidarity sorority tie-in tie-up ties of blood unification union unity