affiliation, alignment, alliance, amalgamation, association, boon companionship, brotherhood, brotherliness, cahoots, chumship, coadunation, coalescence, coalition, colleagueship, collegialism, collegiality, combination, community of interest, companionship, comradeship, confederacy, confederation, confraternity, consolidation, consortship, copartnership, copartnery, esprit de corps, federation, fellowship, fraternalism, fraternity, fraternization, fusion, hookup, inclusion, incorporation, integration, league, merger, partnership, sisterhood, sisterliness, sodality, sorority, tie-in, tie-up, unification, union