* Μῦθος (mythos): This is probably the closest single word. While often translated as "myth," *mythos* encompassed stories, narratives, and legends, particularly those of gods and heroes. It's a good choice if the legend is of a mythical or heroic nature.
* Λέγος (legos): This word means "speech," "telling," or "story." It could be used to describe the act of telling a legend, or the legend itself, but it's less specific than *mythos*.
* Παράδοση (paradosē): This means "tradition" or "handed down." This would be a good choice if the legend is something passed down through generations.
The best choice will depend on the specific legend and the context in which it is used.