union Synonyms - page 5
intersection
interrelation
intermixture
intermarriage
intercourse
interconnection
inseparableness
inseparability
indivisibility
incorporation
engagement
coupler
conjugality
conjoining
congruity
congruency
congruence
congress
conglutination
conglomerate
confraternity
conflux
confluence
concurrence
conjunctional
conjuncture
council
coterie
copulation
coordination
cooperation
convergence
contiguity
consonance
consociation
consilience
connubiality
connexion
concrescence