blood vessel vs vessel

blood vessel and vessel both are nouns.

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

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

Other hypernyms of blood vessel include vas.

blood vessel (noun)	vessel (noun)
a vessel in which blood circulates	a craft designed for water transportation
	an object used as a container (especially for liquids)
	a tube in which a body fluid circulates