aqueductus cerebri vs cerebral aqueduct

aqueductus cerebri and cerebral aqueduct both are nouns.

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

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

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

Other synonyms of aqueductus cerebri include Sylvian aqueduct.

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