cavernous sinus vs sinus cavernosus

cavernous sinus and sinus cavernosus both are nouns.

Word	Noun	Adjective	Verb	Adverb
cavernous sinus	Yes	No	No	No
sinus cavernosus	Yes	No	No	No

As nouns, cavernous sinus and sinus cavernosus are synonyms defined as:

cavernous sinus and sinus cavernosus: either of a pair of large venous sinuses in the cranial cavity

cavernous sinus (noun)	sinus cavernosus (noun)
either of a pair of large venous sinuses in the cranial cavity	either of a pair of large venous sinuses in the cranial cavity