carpal bone vs wrist bone

carpal bone and wrist bone both are nouns.

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

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

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

Other synonyms of carpal bone include carpal.

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