splash vs to-do

splash and to-do both are nouns.

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

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

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

splash (noun)	to-do (noun)
the act of splashing a (liquid) substance on a surface	a disorderly outburst or tumult
the act of scattering water about haphazardly
a patch of bright color
the sound like water splashing
a small quantity of something moist or liquid
a prominent or sensational but short-lived news event

splash (verb)	to-do (verb)
dash a liquid upon or against
cause (a liquid) to spatter about, especially with force
strike and dash about in a liquid
soil or stain with a splashed liquid
mark or overlay with patches of contrasting color or texture; cause to appear splashed or spattered
walk through mud or mire
make a splashing sound