When it comes to describing a sound that is rich, vibrant and full-bodied, the word "full-sounding" might seem like the obvious choice. However, there are many other synonyms you can use to describe such a sound. For example, you could use words like "resonant," "sonorous," "deep," "round," "thick," "lush," "warm," and "powerful." Each of these words captures a slightly different aspect of a sound that is full and rich, but they all convey the same general idea. Whether you are describing a musical performance, a film score, or the sound of a beautifully crafted instrument, these synonyms can help you capture the fullness and depth of the sound in question.