- Formal union - Nuptial - Nuptial rites - Wedlock - The act of marrying, or the state of being married;
legal union of a man and a woman for life, as husband and wife;
wedlock; matrimony. - The marriage vow or contract. - A feast made on the occasion of a marriage.
- A union or association between countries or organisations - Association - Coalition - Confederation - consolidate friendship - consolidated friendship - Formal union