trapezium vs carpal

trapezium and carpal both are nouns.

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

As nouns, carpal is a hypernym of trapezium; that is, carpal is a word with a broader meaning than trapezium:

trapezium: the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals
carpal: any of the eight small bones of the wrist of primates

Other hypernyms of trapezium include carpal bone, wrist bone.

trapezium (noun)	carpal (noun)
the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals	any of the eight small bones of the wrist of primates
a quadrilateral with no parallel sides

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