by-bid vs auction

by-bid is not a noun while auction is a noun.

Word	Noun	Adjective	Verb	Adverb
by-bid	No	No	Yes	No
auction	Yes	No	Yes	No

by-bid (noun)	auction (noun)
	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	a variety of bridge in which tricks made in excess of the contract are scored toward game; now generally superseded by contract bridge

by-bid (verb)	auction (verb)
bid on behalf of someone else	sell at an auction