The tummy muscle is a crucial part of our core muscles. It is responsible for maintaining balance and stability during physical activities. However, there are various synonyms for the tummy muscle that we can use interchangeably. These include abdominal muscles, abs, rectus abdominis, obliques, and transversus abdominis. The abs are the most commonly used synonym for the tummy muscle, and are generally associated with a well-toned and defined midsection. The rectus abdominis is the muscle that runs vertically down the front of the abdomen, while obliques are found on either side. The transversus abdominis is a deep muscle that helps to support the spine and maintain posture.