scorn vs rebuff

scorn and rebuff both are nouns.

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

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

Other hyponyms of scorn include repel, snub.

scorn (noun)	rebuff (noun)
open disrespect for a person or thing	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

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