The term 'altar words' refers to the words spoken during a wedding ceremony. The crossword solutions for this term are VOW (3 letters), IDO (3 letters), VOWS (4 letters), and ARA (3 letters). VOW is an abbreviation for the phrase 'I do, ' which is a common phrase used in wedding ceremonies. IDO is a variation of the same phrase. VOWS are the promises made by the couple to each other during the ceremony. ARA stands for 'as long as we both shall live, ' which is another phrase commonly used in wedding ceremonies.