spit out vs spit

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

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

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

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

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

spit out (noun)	spit (noun)
	the act of spitting (forcefully expelling saliva)
	a skewer for holding meat over a fire
	a clear liquid secreted into the mouth by the salivary glands and mucous glands of the mouth; moistens the mouth and starts the digestion of starches
	a narrow strip of land that juts out into the sea

spit out (verb)	spit (verb)
spit up in an explosive manner	expel or eject (saliva or phlegm or sputum) from the mouth
discharge (phlegm or sputum) from the lungs and out of the mouth	utter with anger or contempt
utter with anger or contempt	drive a skewer through
	rain gently