flutter vs to-do

flutter and to-do both are nouns.

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

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

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

flutter (noun)	to-do (noun)
the act of moving back and forth	a disorderly outburst or tumult
the motion made by flapping up and down
abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block
a disorderly outburst or tumult

flutter (verb)	to-do (verb)
wink briefly
beat rapidly
move back and forth very rapidly
move along rapidly and lightly; skim or dart
flap the wings rapidly or fly with flapping movements