pharyngeal vein vs vena pharyngeus

pharyngeal vein and vena pharyngeus both are nouns.

Word	Noun	Adjective	Verb	Adverb
pharyngeal vein	Yes	No	No	No
vena pharyngeus	Yes	No	No	No

As nouns, pharyngeal vein and vena pharyngeus are synonyms defined as:

pharyngeal vein and vena pharyngeus: veins from the pharyngeal plexus that empty into the internal jugular vein

pharyngeal vein (noun)	vena pharyngeus (noun)
veins from the pharyngeal plexus that empty into the internal jugular vein	veins from the pharyngeal plexus that empty into the internal jugular vein