orbital cavity vs cranial orbit

orbital cavity and cranial orbit both are nouns.

Word	Noun	Adjective	Verb	Adverb
orbital cavity	Yes	No	No	No
cranial orbit	Yes	No	No	No

As nouns, orbital cavity and cranial orbit are synonyms defined as:

orbital cavity and cranial orbit: the bony cavity in the skull containing the eyeball

Other synonyms of orbital cavity include eye socket, orbit.

orbital cavity (noun)	cranial orbit (noun)
the bony cavity in the skull containing the eyeball	the bony cavity in the skull containing the eyeball