The term 'CAST A SPELL OVER' can be broken down into four crossword solutions: BEWITCH (7 letters), ENCHANT (7 letters), ENTHRALL (8 letters), and HEXED (5 letters). All of these words refer to the act of using magic or supernatural powers to influence someone or something. Bewitching is an act of using charm or enchantment to captivate someone, while enchanting is the act of using magical powers to attract or influence someone. Enthralling is the act of captivating someone with a spell or charm, and hexing is the act of using supernatural powers to bring bad luck or misfortune to someone.