aortic plexus vs plexus

aortic plexus and plexus both are nouns.

Word	Noun	Adjective	Verb	Adverb
aortic plexus	Yes	No	No	No
plexus	Yes	No	No	No

As nouns, plexus is a hypernym of aortic plexus; that is, plexus is a word with a broader meaning than aortic plexus:

aortic plexus: a plexus of lymph nodes in the lower portion of the abdominal aorta
plexus: a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels

Other hypernyms of aortic plexus include rete.

aortic plexus (noun)	plexus (noun)
a plexus of lymph nodes in the lower portion of the abdominal aorta	a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels