tomentum cerebri vs tomentum

tomentum cerebri and tomentum both are nouns.

Word	Noun	Adjective	Verb	Adverb
tomentum cerebri	Yes	No	No	No
tomentum	Yes	No	No	No

As nouns, tomentum cerebri and tomentum are synonyms defined as:

tomentum cerebri and tomentum: a network of tiny blood vessels between the cerebral surface of the pia mater and the cerebral cortex

tomentum cerebri (noun)	tomentum (noun)
a network of tiny blood vessels between the cerebral surface of the pia mater and the cerebral cortex	a network of tiny blood vessels between the cerebral surface of the pia mater and the cerebral cortex
	filamentous hairlike growth on a plant