1. (n.) The act of confederating; a league; a compact for mutual support; alliance, particularly of princes, nations, or states.

2. (n.) The parties that are confederated, considered as a unit; a confederacy.

Anschluss Bund Rochdale cooperative addition affiliation agglomeration aggregation agreement alignment alliance amalgamation anschluss assemblage assimilation association axis band blend blending bloc body cabal cahoots cartel centralization coadunation coalescence coalition colleagueship college collegialism collegiality combination combine combo common market composition comradeship confederacy confraternity congeries conglomeration conjugation conjunction consolidation conspiracy consumer cooperative cooperative cooperative society copartnership copartnery corps council credit union customs union economic community ecumenism embodiment encompassment enosis federalization federation fellowship fraternalism fraternity fraternization free trade area freemasonry fusion gang group grouping hookup inclusion incorporation integration junction junta league machine marriage meld melding merger mob package package deal partnership political machine ring society sodality solidification sorority syncretism syndication syneresis synthesis tie-in tie-up unification union wedding