tumultuousness vs commotion

tumultuousness and commotion both are nouns.

Word	Noun	Adjective	Verb	Adverb
tumultuousness	Yes	No	No	No
commotion	Yes	No	No	No

As nouns, commotion is a hypernym of tumultuousness; that is, commotion is a word with a broader meaning than tumultuousness:

Other hypernyms of tumultuousness include disruption, disturbance, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle, to-do.

tumultuousness (noun)	commotion (noun)
a state of commotion and noise and confusion	the act of making a noisy disturbance
	confused movement
	a disorderly outburst or tumult