spit out vs utter

spit out is not an adjective while utter is an adjective.

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

As verbs, utter is a hypernym of spit out; that is, utter is a word with a broader meaning than spit out:

Other hypernyms of spit out include emit, let loose, let out.

spit out (adjective)	utter (adjective)
	complete and absolute
	without qualification; used informally as (often pejorative) intensifiers

spit out (verb)	utter (verb)
spit up in an explosive manner	express in speech
discharge (phlegm or sputum) from the lungs and out of the mouth	articulate; either verbally or with a cry, shout, or noise
utter with anger or contempt	express audibly; utter sounds (not necessarily words)
	put into circulation