When it comes to describing the digestive system of humans or animals, the term "alimentary tract" is often used. However, there are some synonyms that you might find useful to use in your writing or conversation. One alternative term is "digestive tract," which is a broader term that includes the stomach, small intestine, and large intestine. Another synonym is "gastrointestinal tract," which refers to the same set of organs but emphasizes the fact that digestion involves the stomach (gastro-) and intestines (-intestinal). The term "gut" can also be used informally to refer to the alimentary tract. No matter which of these terms you choose, they all describe the same set of organs through which food passes as it is broken down and absorbed.