tumult vs to-do

tumult and to-do both are nouns.

Word	Noun	Adjective	Verb	Adverb
tumult	Yes	No	No	No
to-do	Yes	No	No	No

As nouns, to-do is a hypernym of tumult; that is, to-do is a word with a broader meaning than tumult:

Other hypernyms of tumult include commotion, disruption, disturbance, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle.

tumult (noun)	to-do (noun)
the act of making a noisy disturbance	a disorderly outburst or tumult
violent agitation
a state of commotion and noise and confusion