zygomatic process vs appendage

zygomatic process and appendage both are nouns.

Word	Noun	Adjective	Verb	Adverb
zygomatic process	Yes	No	No	No
appendage	Yes	No	No	No

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

zygomatic process: a slender process of the temporal bone that strengthens the zygomatic arch
appendage: a natural prolongation or projection from a part of an organism either animal or plant

Other hypernyms of zygomatic process include outgrowth, process.

zygomatic process (noun)	appendage (noun)
a slender process of the temporal bone that strengthens the zygomatic arch	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