The term ALTAR VOW is a reference to the traditional wedding ceremony, in which the couple makes a vow to each other before God. The crossword solutions for this term are OBEY (4 letters), HONOR (5 letters), and IDO (3 letters). OBEY refers to the commitment to follow the commands of one's partner, Honor is a promise to respect and revere one's partner, and IDO is an acronym for 'I do', the traditional phrase used to signify agreement to the marriage.