The expression 'most filmed' can be phrased in several different ways. One possible synonym is 'most frequently adapted', which implies that a particular work or story has been made into multiple film versions. Another synonym is 'most often depicted', which refers to the visual representation of a particular subject or character in cinema. 'Most popularly filmed' evokes the idea of audience appeal and suggests that a certain genre or theme has been consistently well-received by moviegoers. Finally, 'most extensively portrayed' implies that a particular event, person, or era has been extensively explored on film, perhaps across multiple movies or series.