spheroid joint vs cotyloid joint

spheroid joint and cotyloid joint both are nouns.

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

As nouns, spheroid joint and cotyloid joint are synonyms defined as:

spheroid joint and 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

Other synonyms of spheroid joint include articulatio spheroidea, ball-and-socket joint, enarthrodial joint, enarthrosis.

spheroid joint (noun)	cotyloid joint (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 freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone