nex·us /'nek-səs/ n pl nex·us·es or nexus /-səs, -ˌsüs/ [Latin, bond, tie, from nectere to bind]: a connection or link between things, persons, or events esp. that is or is part of a chain of causation
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.
affiliation, alliance, association, attachment, bond, bridge, connecting link, connection, connective, coupling, interconnection, intermedium, interrelation, kinship, liaison, link, privity, relation, relationship, thread, tie, union, vinculum
attachment (act of affixing), connection (fastening), contact (touching), liaison, privity, relation (connection), sequence
Burton's Legal Thesaurus. William C. Burton. 2006
a tie or connection. The phrase often encountered was legal nexus.
Collins dictionary of law. W. J. Stewart. 2001.