plexus lumbalis vs rete

plexus lumbalis and rete both are nouns.

Word	Noun	Adjective	Verb	Adverb
plexus lumbalis	Yes	No	No	No
rete	Yes	No	No	No

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

plexus lumbalis: a lymphatic plexus located along the lower portion of the aorta and iliac vessels
rete: a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels

Other hypernyms of plexus lumbalis include plexus.

plexus lumbalis (noun)	rete (noun)
a plexus of nerves formed by the ventral branches of the first four lumbar nerves	a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels
a lymphatic plexus located along the lower portion of the aorta and iliac vessels