vocalize vs utter

vocalize is not an adjective while utter is an adjective.

Word	Noun	Adjective	Verb	Adverb
vocalize	No	No	Yes	No
utter	No	Yes	Yes	No

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

Other hypernyms of vocalize include mouth, speak, talk, verbalise, verbalize.

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

vocalize (verb)	utter (verb)
pronounce as a vowel	express in speech
express or state clearly	articulate; either verbally or with a cry, shout, or noise
utter with vibrating vocal chords	express audibly; utter sounds (not necessarily words)
utter speech sounds	put into circulation
sing (each note a scale or in a melody) with the same vowel