spray painting vs spraying

spray painting and spraying both are nouns.

Word	Noun	Adjective	Verb	Adverb
spray painting	Yes	No	No	No
spraying	Yes	No	No	No

As nouns, spraying is a hypernym of spray painting; that is, spraying is a word with a broader meaning than spray painting:

spray painting: applying paint with a sprayer
spraying: the application of a liquid in the form of small particles ejected from a sprayer

Other hypernyms of spray painting include painting.

spray painting (noun)	spraying (noun)
applying paint with a sprayer	the application of a liquid in the form of small particles ejected from a sprayer
	the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft)
	a quantity of small objects flying through the air