sinus cavernosus vs cavernous sinus

sinus cavernosus and cavernous sinus both are nouns.

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

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

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

sinus cavernosus (noun)	cavernous sinus (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