metaphysis vs appendage

metaphysis and appendage both are nouns.

Word	Noun	Adjective	Verb	Adverb
metaphysis	Yes	No	No	No
appendage	Yes	No	No	No

As nouns, appendage is a hypernym of metaphysis; that is, appendage is a word with a broader meaning than metaphysis:

metaphysis: the growing part of a long bone between the diaphysis and the epiphysis
appendage: a natural prolongation or projection from a part of an organism either animal or plant

Other hypernyms of metaphysis include outgrowth, process.

metaphysis (noun)	appendage (noun)
the growing part of a long bone between the diaphysis and the epiphysis	a part that is joined to something larger
	an external body part that projects from the body
	a natural prolongation or projection from a part of an organism either animal or plant