os triquetrum vs pyramidal bone

os triquetrum and pyramidal bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
os triquetrum	Yes	No	No	No
pyramidal bone	Yes	No	No	No

As nouns, os triquetrum and pyramidal bone are synonyms defined as:

os triquetrum and pyramidal bone: a wrist bone that articulates with the pisiform and hamate and lunate bones

Other synonyms of os triquetrum include cuneiform bone, triquetral, triquetral bone.

os triquetrum (noun)	pyramidal bone (noun)
a wrist bone that articulates with the pisiform and hamate and lunate bones	a wrist bone that articulates with the pisiform and hamate and lunate bones