wolf-whistle vs utter

wolf-whistle is not an adjective while utter is an adjective.

Word	Noun	Adjective	Verb	Adverb
wolf-whistle	No	No	Yes	No
utter	No	Yes	Yes	No

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

Other hypernyms of wolf-whistle include emit, let loose, let out.

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

wolf-whistle (verb)	utter (verb)
whistle or howl approvingly at a female, of males	express in speech
	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation