The term 'UNION SYMBOL' can be represented by three different crossword solutions: RING (4 letters), DRING (5 letters), and WEDDINGRING (11 letters). The most common SYMBOL of UNION is a RING, which is often used to represent marriage or other forms of commitment. A DRING is a double RING, which is sometimes used to symbolize the joining of two people or entities. Finally, a WEDDINGRING is a type of RING that is traditionally exchanged between two people during a wedding ceremony, signifying their UNION.