talk about vs utter

talk about is not an adjective while utter is an adjective.

Word	Noun	Adjective	Verb	Adverb
talk about	No	No	Yes	No
utter	No	Yes	Yes	No

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

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

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

talk about (verb)	utter (verb)
to consider or examine in speech or writing	express in speech
discuss or mention	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation