prestigiousness vs prestigious

prestigiousness is a noun but prestigious is not a noun.

Word	Noun	Adjective	Verb	Adverb
prestigiousness	Yes	No	No	No
prestigious	No	Yes	No	No

prestigiousness (noun)	prestigious (noun)
a high standing achieved through success or influence or wealth etc.

prestigiousness (adjective)	prestigious (adjective)
	exerting influence by reason of high status or prestige
	having an illustrious reputation; respected