auction sale vs auction

auction sale and auction both are nouns.

Word	Noun	Adjective	Verb	Adverb
auction sale	Yes	No	No	No
auction	Yes	No	Yes	No

As nouns, auction sale and auction are synonyms defined as:

auction sale and auction: the public sale of something to the highest bidder

Other synonyms of auction sale include vendue.

auction sale (noun)	auction (noun)
the public sale of something to the highest bidder	the public sale of something to the highest bidder
	a variety of bridge in which tricks made in excess of the contract are scored toward game; now generally superseded by contract bridge

auction sale (verb)	auction (verb)
	sell at an auction