Vena sublingualis is a term used to describe the sublingual vein, which is located beneath the tongue. Although this is a very specific term, there are a few synonyms that can be used to describe this same anatomical feature. One possible synonym is the sublingual venous plexus, which refers to the network of veins that are located beneath the tongue. Another possible synonym is the ranine vein, which is a small vein that is located at the base of the tongue. Finally, the deep lingual vein is another term that can be used to describe the vena sublingualis, as it describes the vein that runs parallel to the tongue.