Iguazu is a word that is specific to the stunning natural wonder found on the border of Brazil and Argentina. It is a word that evokes images of sprawling waterfalls, lush greenery, and exotic wildlife. While there aren't many synonyms for the term "Iguazu," there are words that can evoke similar feelings and images. For example, synonyms for "natural wonder" might include "spectacle," "marvel," or "miracle." Synonyms for "lush" could include "verdant," "luxuriant," or "flourishing." Similarly, words like "exotic" or "breathtaking" might be used to describe the unique beauty of the Iguazu Falls.