spit out vs sputter

spit out is not a noun while sputter is a noun.

Word	Noun	Adjective	Verb	Adverb
spit out	No	No	Yes	No
sputter	Yes	No	Yes	No

As verbs, spit out and sputter are synonyms defined as:

Other synonyms of spit out include splutter.

As verbs, sputter is a hyponym of spit out; that is, sputter is a word with a more specific, narrower meaning than spit out:

Other hyponyms of spit out include cough, ptyalise, ptyalize, spew, spit, spue, spit out, splutter.

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

spit out (verb)	sputter (verb)
spit up in an explosive manner	spit up in an explosive manner
discharge (phlegm or sputum) from the lungs and out of the mouth	cause to undergo a process in which atoms are removed
utter with anger or contempt	utter with a spitting sound, as if in a rage
	climb awkwardly, as if by scrambling
	make an explosive sound