Anschluss
absorption
addition
affiliation
agglomeration
aggregation
agreement
alignment
alliance
amalgamation
assimilation
association
beleaguerment
besetment
blend
blending
blockade
blockading
cabal
cahoots
cartel
centralization
cincture
circling
circumambience
circumambiency
circumcincture
circumflexion
circumjacence
circumposition
circumscription
classification
coadunation
coalescence
coalition
colleagueship
collegialism
collegiality
combination
combine
combo
composition
comprehension
comprisal
comradeship
confederacy
confederation
confinement
confraternity
congeries
involvement
exclusion
implementation
participation
placement
subordination
allusion
collusion
conclusion
confusion
contusion
delusion
diffusion
disillusion
extrusion
fusion
illusion
infusion
intrusion
occlusion
preclusion
profusion
rediffusion
reperfusion
seclusion
transfusion