joining, connection, contiguity, junction

connection, anything to do with, participation; peculiarity, specialty, speciality, specialization; assignment, appropriation

relation, connection; need

connection, relation, bridge

relationship, connection, belonging; origin; preface, forward (in a book)

participation, subscription, joining

joining, connection, affiliation, unity

joining, alongside

partnership, joining, company

annexation, addition, adjunction, attachment, affiliation

attachment, love, affection, passion (for something or someone)

love, affection, attachment (Arabic)

union, alliance

union

putting, sticking, or stitching together, union, grafting in; graft in, scion, union, bond

unity, coalition, union

in agreement, agreeing, in union, unanimous

mixing, mixture, blending, merging, contact, association, conversation, chatting

society, association, gathering, assembly, congregation

society, association, meeting; plurality (grammar); population, riches

meeting, association, league, society

contact, dealing with, spending time with, having association or communication (literally sitting and getting up)