painting vs splashing

painting and splashing both are nouns.

Word	Noun	Adjective	Verb	Adverb
painting	Yes	No	No	No
splashing	Yes	No	No	No

As nouns, splashing is a hyponym of painting; that is, splashing is a word with a more specific, narrower meaning than painting:

Other hyponyms of painting include spray painting, spatter, spattering, splash, splattering, finger-painting.

painting (noun)	splashing (noun)
creating a picture with paints	the act of splashing a (liquid) substance on a surface
the occupation of a house painter	the act of scattering water about haphazardly
the act of applying paint to a surface
graphic art consisting of an artistic composition made by applying paints to a surface