human elbow vs ginglymoid joint

human elbow and ginglymoid joint both are nouns.

Word	Noun	Adjective	Verb	Adverb
human elbow	Yes	No	No	No
ginglymoid joint	Yes	No	No	No

As nouns, ginglymoid joint is a hypernym of human elbow; that is, ginglymoid joint is a word with a broader meaning than human elbow:

human elbow: hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped
ginglymoid joint: a freely moving joint in which the bones are so articulated as to allow extensive movement in one plane

Other hypernyms of human elbow include ginglymus, hinge joint.

human elbow (noun)	ginglymoid joint (noun)
hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped	a freely moving joint in which the bones are so articulated as to allow extensive movement in one plane