brush off vs discount

brush off is not a noun while discount is a noun.

Word	Noun	Adjective	Verb	Adverb
brush off	No	No	Yes	No
discount	Yes	No	Yes	No

As verbs, brush off and discount are synonyms defined as:

Other synonyms of brush off include brush aside, dismiss, disregard, ignore, push aside.

brush off (noun)	discount (noun)
	the act of reducing the selling price of merchandise
	an amount or percentage deducted
	interest on an annual basis deducted in advance on a loan
	a refund of some fraction of the amount paid

brush off (verb)	discount (verb)
bar from attention or consideration	bar from attention or consideration
	give a reduction in price on