The Order Gaviiformes, also known as the loons, are a group of aquatic birds found in North America, Eurasia, and Greenland. While it may seem like there are only a few synonyms for this specific order of birds, there are actually quite a few descriptors that can be used to identify them. Some possible synonyms for the Order Gaviiformes include diving birds, waterfowl, aquatic birds, or simply loons. They are known for their distinctive calls, striking plumage, and ability to swim and dive underwater for extended periods of time. Overall, the Order Gaviiformes is a fascinating group of birds with many unique characteristics.