wrist joint vs carpal

wrist joint and carpal both are nouns.

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

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

wrist joint (adjective)	carpal (adjective)
	of or relating to the wrist