disdain vs turn down

disdain is a noun but turn down is not a noun.

Word	Noun	Adjective	Verb	Adverb
disdain	Yes	No	Yes	No
turn down	No	No	Yes	No

As verbs, disdain and turn down are synonyms defined as:

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

disdain (noun)	turn down (noun)
a communication that indicates lack of respect by patronizing the recipient
lack of respect accompanied by a feeling of intense dislike

disdain (verb)	turn down (verb)
reject with contempt	make lower or quieter
look down on with disdain	take a downward direction
	reject with contempt
	not accept as true
	refuse entrance or membership