trapezoid vs trapezoid bone

trapezoid and trapezoid bone both are nouns.

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

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

trapezoid and trapezoid bone: the wrist bone between the trapezium and the capitate bones

Other synonyms of trapezoid include os trapezoideum.

trapezoid (noun)	trapezoid bone (noun)
the wrist bone between the trapezium and the capitate bones	the wrist bone between the trapezium and the capitate bones
a quadrilateral with two parallel sides