hepatic portal vein vs portal

hepatic portal vein and portal both are nouns.

Word	Noun	Adjective	Verb	Adverb
hepatic portal vein	Yes	No	No	No
portal	Yes	No	No	No

As nouns, hepatic portal vein and portal are synonyms defined as:

hepatic portal vein and portal: a short vein that carries blood into the liver

Other synonyms of hepatic portal vein include portal vein, vena portae.

hepatic portal vein (noun)	portal (noun)
a short vein that carries blood into the liver	a grand and imposing entrance (often extended metaphorically)
	a short vein that carries blood into the liver
	a site that the owner positions as an entrance to other sites on the internet