What is the answer to A synonymous crossword puzzle in the Egypt game?

In "The Egypt Game" by Zilpha Keatley Snyder, the answer to the synonymous crossWord puzzle is "Nile." The context of the puzzle connects to the themes of ancient Egypt and its geography, specifically referencing the famous river that played a crucial role in the civilization's development. This answer highlights the characters' fascination with Egypt and their imaginative play surrounding it.