elbow joint vs cubital joint

elbow joint and cubital joint both are nouns.

Word	Noun	Adjective	Verb	Adverb
elbow joint	Yes	No	No	No
cubital joint	Yes	No	No	No

As nouns, elbow joint and cubital joint are synonyms defined as:

elbow joint and cubital joint: hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped

Other synonyms of elbow joint include articulatio cubiti, cubitus, elbow, human elbow.

elbow joint (noun)	cubital joint (noun)
hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped	hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped