pooh-pooh vs turn down

pooh-pooh and turn down both are verbs.

Word	Noun	Adjective	Verb	Adverb
pooh-pooh	No	No	Yes	No
turn down	No	No	Yes	No

As verbs, pooh-pooh and turn down are synonyms defined as:

Other synonyms of pooh-pooh include disdain, freeze off, reject, scorn, spurn.

pooh-pooh (verb)	turn down (verb)
reject with contempt	make lower or quieter
express contempt about	take a downward direction
	reject with contempt
	not accept as true
	refuse entrance or membership