Anschluss
Bund
Rochdale cooperative
addition
affiliation
agglomeration
aggregation
agreement
alignment
alliance
amalgamation
anschluss
artifice
assemblage
assimilation
association
axis
band
blend
blending
bloc
body
cabal
cahoots
cartel
centralization
coadunation
coalescence
coalition
colleagueship
college
collegialism
collegiality
collusion
combination
combine
combo
common market
compact
complicity
complot
composition
comradeship
confederation
confraternity
congeries
conspiracy
circle
geographic area
geographic region
geographical area
geographical region
lot
set
canton
commonwealth
domination
dynasty
federation
insurrection
monarchy
organisation
republic
tribunal