shoulder joint vs articulatio humeri

shoulder joint and articulatio humeri both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoulder joint	Yes	No	No	No
articulatio humeri	Yes	No	No	No

As nouns, shoulder joint and articulatio humeri are synonyms defined as:

shoulder joint and articulatio humeri: a ball-and-socket joint between the head of the humerus and a cavity of the scapula

Other synonyms of shoulder joint include shoulder.

shoulder joint (noun)	articulatio humeri (noun)
a ball-and-socket joint between the head of the humerus and a cavity of the scapula	a ball-and-socket joint between the head of the humerus and a cavity of the scapula