The term "Vena Iliaca" refers to the common iliac vein, which is a major blood vessel responsible for returning deoxygenated blood from the lower limbs and pelvic organs to the heart. There are several synonyms for this term, including iliac vein, common iliac vein, iliac vessel, and hypogastric vein. Each of these terms can be used interchangeably to refer to the same blood vessel. Proper identification and knowledge of these synonyms can help healthcare professionals effectively communicate and document patient information, ultimately leading to better patient care.