disdain vs rebuff

disdain and rebuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
disdain	Yes	No	Yes	No
rebuff	Yes	No	Yes	No

As verbs, rebuff is a hyponym of disdain; that is, rebuff is a word with a more specific, narrower meaning than disdain:

Other hyponyms of disdain include repel, snub.

disdain (noun)	rebuff (noun)
a communication that indicates lack of respect by patronizing the recipient	a deliberate discourteous act (usually as an expression of anger or disapproval)
lack of respect accompanied by a feeling of intense dislike	an instance of driving away or warding off

disdain (verb)	rebuff (verb)
reject with contempt	reject outright and bluntly
look down on with disdain	force or drive back