pooh-pooh vs utter

pooh-pooh is not an adjective while utter is an adjective.

Word	Noun	Adjective	Verb	Adverb
pooh-pooh	No	No	Yes	No
utter	No	Yes	Yes	No

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

Other hypernyms of pooh-pooh include express, give tongue to, verbalise, verbalize.

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

pooh-pooh (verb)	utter (verb)
reject with contempt	express in speech
express contempt about	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation