styloid process vs appendage

styloid process and appendage both are nouns.

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

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

styloid process: extends from the base of the temporal bone
appendage: a natural prolongation or projection from a part of an organism either animal or plant

Other hypernyms of styloid process include outgrowth, process.

styloid process (noun)	appendage (noun)
extends from the base of the temporal bone	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