turn down vs dishonor

turn down is not a noun while dishonor is a noun.

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

As verbs, dishonor is a hyponym of turn down; that is, dishonor is a word with a more specific, narrower meaning than turn down:

Other hyponyms of turn down include dishonour, bounce.

turn down (noun)	dishonor (noun)
	lacking honor or integrity
	a state of shame or disgrace

turn down (verb)	dishonor (verb)
make lower or quieter	refuse to accept
take a downward direction	bring shame or dishonor upon
reject with contempt	force (someone) to have sex against their will
not accept as true
refuse entrance or membership