enarthrosis vs coxa

enarthrosis and coxa both are nouns.

Word	Noun	Adjective	Verb	Adverb
enarthrosis	Yes	No	No	No
coxa	Yes	No	No	No

As nouns, coxa is a hyponym of enarthrosis; that is, coxa is a word with a more specific, narrower meaning than enarthrosis:

enarthrosis: a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone
coxa: the ball-and-socket joint between the head of the femur and the acetabulum

Other hyponyms of enarthrosis include articulatio humeri, shoulder, shoulder joint, articulatio coxae, hip, hip joint.

enarthrosis (noun)	coxa (noun)
a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone	the ball-and-socket joint between the head of the femur and the acetabulum