cotyloid joint vs hip

cotyloid joint and hip both are nouns.

Word	Noun	Adjective	Verb	Adverb
cotyloid joint	Yes	No	No	No
hip	Yes	Yes	No	No

As nouns, hip is a hyponym of cotyloid joint; that is, hip is a word with a more specific, narrower meaning than cotyloid joint:

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

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

cotyloid joint (noun)	hip (noun)
a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone	either side of the body below the waist and above the thigh
	the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates
	the ball-and-socket joint between the head of the femur and the acetabulum
	the fruit of a rose plant
	(architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof

cotyloid joint (adjective)	hip (adjective)
	informed about the latest trends