The term 'Called Upon' can be summarized by four crossword solutions: Invoked (7 letters), BADE (4 letters), VISITED (7 letters), and TurnedTo (8 letters). Invoked means to summon or appeal to a higher power, while BADE is an archaic term meaning to command or request. VISITED implies that someone has gone to a certain place, and TurnedTo suggests that someone has sought help from another person. All of these words imply that someone has been asked to do something.