bipartisanship
centering
centralism
centralization
coaction
coadjuvancy
coadministration
coagency
cochairmanship
codirectorship
collaboration
collaborativeness
collectivism
collusion
commensalism
common effort
common enterprise
communalism
communism
communitarianism
community
complicity
concentralization
concentration
concert
concord
concordance
concurrence
convergence
cooperation
cooperativeness
duet
duumvirate
ecumenicalism
ecumenicism
ecumenism
esprit
esprit de corps
fellow feeling
fellowship
focalization
focusing
harmony
joining of forces
joint effort
joint operation
mass action
morale
mutual assistance
mutualism
cooling
drooling
dueling
fooling
fueling
fuelling
grueling
refueling
retooling
ruling
schooling
tooling