to-do vs disturbance

to-do and disturbance both are nouns.

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

As nouns, to-do and disturbance are synonyms defined as:

Other synonyms of to-do include commotion, disruption, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle.

to-do (noun)	disturbance (noun)
a disorderly outburst or tumult	the act of disturbing something or someone; setting something in motion
	a noisy fight
	activity that is a malfunction, intrusion, or interruption
	electrical or acoustic activity that can disturb communication
	a disorderly outburst or tumult
	(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness
	an unhappy and worried mental state