The term vena cervicalis profunda refers to a deep cervical vein located in the neck. There are several synonym terms used for this vein including the deep cervical vein, internal jugular vein, and subclavian vein. Other terms that have been used to describe this vein include the transverse cervical vein, the vertebral vein, and the brachiocephalic vein. While there may be some slight differences in the location and connection of these veins, they all serve similar functions in the transport of blood and oxygen throughout the body. Understanding these synonyms and their functions can be important for clinical and medical professionals.