ball-and-socket joint vs spheroid joint

ball-and-socket joint and spheroid joint both are nouns.

Word	Noun	Adjective	Verb	Adverb
ball-and-socket joint	Yes	No	No	No
spheroid joint	Yes	No	No	No

As nouns, ball-and-socket joint and spheroid joint are synonyms defined as:

ball-and-socket joint and spheroid 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 ball-and-socket joint include articulatio spheroidea, cotyloid joint, enarthrodial joint, enarthrosis.

ball-and-socket joint (noun)	spheroid joint (noun)
a joint that can rotate within a socket	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