discount vs refund

discount and refund both are nouns.

Word	Noun	Adjective	Verb	Adverb
discount	Yes	No	Yes	No
refund	Yes	No	Yes	No

As nouns, refund is a hypernym of discount; that is, refund is a word with a broader meaning than discount:

discount (noun)	refund (noun)
the act of reducing the selling price of merchandise	the act of returning money received previously
an amount or percentage deducted	money returned to a payer
interest on an annual basis deducted in advance on a loan
a refund of some fraction of the amount paid

discount (verb)	refund (verb)
bar from attention or consideration	pay back
give a reduction in price on