noun
1.
Synonyms: unification , coadunation, coalition, combination, consolidation, melding, mergence, merger, merging
Antonyms: disunion
2.
Synonyms: association 2, brotherhood, club, congress, fellowship, guild, league, order, society, sodality
3.
Synonyms: joint 1, connection, coupling, joining, junction, juncture, seam
4.
Synonyms: alliance 2, anschluss, coalition, confederacy, confederation, federation, league