The phrase "hanging garden" refers to a garden that is suspended or elevated. Some synonyms for hanging garden include aerial garden, elevated garden, and rooftop garden. These gardens are becoming increasingly popular in urban areas where space is limited and people are looking to bring more greenery into their lives. Other synonyms for hanging garden could include vertical garden, tower garden, and suspended garden. No matter what you call it, these gardens are a great way to add more plants and nature to your environment. With their unique design, they offer a stunning visual display and can help reduce the heat island effect in cities.