wrist joint vs wrist

wrist joint and wrist both are nouns.

Word	Noun	Adjective	Verb	Adverb
wrist joint	Yes	No	No	No
wrist	Yes	No	No	No

As nouns, wrist joint and wrist are synonyms defined as:

wrist joint and wrist: a joint between the distal end of the radius and the proximal row of carpal bones

Other synonyms of wrist joint include articulatio radiocarpea, carpus, radiocarpal joint.

wrist joint (noun)	wrist (noun)
a joint between the distal end of the radius and the proximal row of carpal bones	a joint between the distal end of the radius and the proximal row of carpal bones