There are several synonyms for the term "main artery," which refers to a large blood vessel that carries blood away from the heart and to the rest of the body. Some common synonyms include "large blood vessel," "major artery," "principal artery," "central artery," and "primary vessel." Additional synonyms may include "main vein," "dominant artery," "chief blood vessel," "critical vessel," and "essential conduit." These terms may be used interchangeably depending on the context in which they are used, and can be particularly useful in medical and anatomical contexts or when describing the circulatory system.