aqueductus cerebri vs Sylvian aqueduct

aqueductus cerebri and Sylvian aqueduct both are nouns.

Word	Noun	Adjective	Verb	Adverb
aqueductus cerebri	Yes	No	No	No
Sylvian aqueduct	Yes	No	No	No

As nouns, aqueductus cerebri and Sylvian aqueduct are synonyms defined as:

aqueductus cerebri and Sylvian aqueduct: a canal connecting the third and fourth ventricles

Other synonyms of aqueductus cerebri include cerebral aqueduct.

aqueductus cerebri (noun)	Sylvian aqueduct (noun)
a canal connecting the third and fourth ventricles	a canal connecting the third and fourth ventricles