radiocarpal joint vs carpus

radiocarpal joint and carpus both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiocarpal joint	Yes	No	No	No
carpus	Yes	No	No	No

As nouns, radiocarpal joint and carpus are synonyms defined as:

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

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

radiocarpal joint (noun)	carpus (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