popliteal vein vs vena poplitea

popliteal vein and vena poplitea both are nouns.

Word	Noun	Adjective	Verb	Adverb
popliteal vein	Yes	No	No	No
vena poplitea	Yes	No	No	No

As nouns, popliteal vein and vena poplitea are synonyms defined as:

popliteal vein and vena poplitea: a vein arising in the knee and ascending to become the femoral vein

popliteal vein (noun)	vena poplitea (noun)
a vein arising in the knee and ascending to become the femoral vein	a vein arising in the knee and ascending to become the femoral vein