There are many words that can match ecstatic, basically anything that means happy because ecstatic is just very happy, so words like joy, excitement, happiness, joyful, many words that have similar meanings, but I would need the part of the story if I needed to directly point out signal words for ecstatic.
In dream variations by langston hughes and the tropics in new york by claude mckay, both longing for their Childhood landscape, a place where they grew up. They describe it as a place that filled with trees and fruits where they can have fun all day
hope this helps
