The antonyms for the word "over flown" are "under flown" or "below flown." These terms indicate the opposite of flying over or above something, instead referring to flying under or below it. For example, if a bird is flying below the treetops, it is "under flown" in relation to the treetops. Similarly, if an airplane is flying under a bridge, it is "below flown." These antonyms can be applied in various contexts, from aviation and nature observation to poetry and literature. Regardless of the context, antonyms provide a valuable tool for clarifying meaning and enhancing language usage.