chain coupling
agglomeration
agglutination
aggregation
ankle
articulation
bond
boundary
bracketing
butt
cervix
clinch
closure
clustering
combination
communication
concatenation
concourse
concurrence
confluence
congeries
conglomeration
conjugation
conjunction
connecting link
connecting rod
connection
convergence
copulation
couple
dovetail
elbow
embrace
gathering
gliding joint
hinge
hinged joint
hip
hookup
intercommunication
intercourse
interface
interlinking
join
joinder
joining
joint
jointure
junction
juncture
connecter
connective
connector
connexion
decoupling