wrist bone vs carpal

wrist bone and carpal both are nouns.

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

As nouns, wrist bone and carpal are synonyms defined as:

wrist bone and carpal: any of the eight small bones of the wrist of primates

Other synonyms of wrist bone include carpal bone.

wrist bone (noun)	carpal (noun)
any of the eight small bones of the wrist of primates	any of the eight small bones of the wrist of primates

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