sputtering vs sputter

sputtering and sputter both are nouns.

Word	Noun	Adjective	Verb	Adverb
sputtering	Yes	No	No	No
sputter	Yes	No	Yes	No

As nouns, sputtering and sputter are synonyms defined as:

sputtering and sputter: the noise of something spattering or sputtering explosively

Other synonyms of sputtering include spatter, spattering, splatter, splattering, splutter.

sputtering (noun)	sputter (noun)
the noise of something spattering or sputtering explosively	an utterance (of words) with spitting sounds (as in rage)
	the noise of something spattering or sputtering explosively

sputtering (verb)	sputter (verb)
	spit up in an explosive manner
	cause to undergo a process in which atoms are removed
	utter with a spitting sound, as if in a rage
	climb awkwardly, as if by scrambling
	make an explosive sound