sales event vs cut-rate sale

sales event and cut-rate sale both are nouns.

Word	Noun	Adjective	Verb	Adverb
sales event	Yes	No	No	No
cut-rate sale	Yes	No	No	No

As nouns, sales event and cut-rate sale are synonyms defined as:

sales event and cut-rate sale: an occasion (usually brief) for buying at specially reduced prices

Other synonyms of sales event include sale.

sales event (noun)	cut-rate sale (noun)
an occasion (usually brief) for buying at specially reduced prices	an occasion (usually brief) for buying at specially reduced prices