aponeurosis vs fascia

aponeurosis and fascia both are nouns.

Word	Noun	Adjective	Verb	Adverb
aponeurosis	Yes	No	No	No
fascia	Yes	No	No	No

As nouns, fascia is a hypernym of aponeurosis; that is, fascia is a word with a broader meaning than aponeurosis:

aponeurosis: any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons
fascia: a sheet or band of fibrous connective tissue separating or binding together muscles and organs etc

Other hypernyms of aponeurosis include facia.

aponeurosis (noun)	fascia (noun)
any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons	instrument panel on an automobile or airplane containing dials and controls
	a sheet or band of fibrous connective tissue separating or binding together muscles and organs etc