carpal bone vs carpal

carpal bone and carpal both are nouns.

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

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

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

Other synonyms of carpal bone include wrist bone.

carpal 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

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