brain vs communicating artery

brain and communicating artery both are nouns.

Word	Noun	Adjective	Verb	Adverb
brain	Yes	No	Yes	No
communicating artery	Yes	No	No	No

brain (noun)	communicating artery (noun)
that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord	any of three arteries in the brain that make up the circle of Willis
mental ability
that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason
the brain of certain animals used as meat
someone who has exceptional intellectual ability and originality

brain (verb)	communicating artery (verb)
hit on the head
kill by smashing someone's skull