The phrase "in backwater" means to be isolated or left behind in terms of progress, growth or development. However, there are several antonyms that can be used to describe the opposite of being in backwater. Some of these antonyms include advanced, modern, current, thriving, prosperous, up-to-date, and innovative. Rather than being stagnant, being advanced, modern or up-to-date suggests that an individual, organization or community is constantly evolving, making progress, and embracing change. On the other hand, thriving, prosperous or innovative are antonyms relating to business, economics, and entrepreneurship. These words indicate a state of success, wealth, and continuous growth.