gliding joint vs diarthrosis

gliding joint and diarthrosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
gliding joint	Yes	No	No	No
diarthrosis	Yes	No	No	No

As nouns, diarthrosis is a hypernym of gliding joint; that is, diarthrosis is a word with a broader meaning than gliding joint:

gliding joint: a freely moving joint in which the articulations allow only gliding motions
diarthrosis: a joint so articulated as to move freely

Other hypernyms of gliding joint include articulatio synovialis, synovial joint.

gliding joint (noun)	diarthrosis (noun)
a freely moving joint in which the articulations allow only gliding motions	a joint so articulated as to move freely