enarthrosis vs diarthrosis

enarthrosis and diarthrosis both are nouns.

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

As nouns, diarthrosis is a hypernym of enarthrosis; that is, diarthrosis is a word with a broader 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
diarthrosis: a joint so articulated as to move freely

Other hypernyms of enarthrosis include articulatio synovialis, synovial joint.

enarthrosis (noun)	diarthrosis (noun)
a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone	a joint so articulated as to move freely