vena pharyngeus vs pharyngeal vein

vena pharyngeus and pharyngeal vein both are nouns.

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

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

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

vena pharyngeus (noun)	pharyngeal vein (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