portal vs venous blood vessel

portal and venous blood vessel both are nouns.

Word	Noun	Adjective	Verb	Adverb
portal	Yes	No	No	No
venous blood vessel	Yes	No	No	No

As nouns, venous blood vessel is a hypernym of portal; that is, venous blood vessel is a word with a broader meaning than portal:

portal: a short vein that carries blood into the liver
venous blood vessel: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of portal include vein, vena.

portal (noun)	venous blood vessel (noun)
a grand and imposing entrance (often extended metaphorically)	a blood vessel that carries blood from the capillaries toward the heart
a short vein that carries blood into the liver
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