bid vs bidder

bid and bidder both are nouns.

Word	Noun	Adjective	Verb	Adverb
bid	Yes	No	Yes	No
bidder	Yes	No	No	No

bid (noun)	bidder (noun)
an attempt to get something	someone who makes an offer
a formal proposal to buy at a specified price	someone who makes a bid at cards
(bridge) the number of tricks a bridge player is willing to contract to make
an authoritative direction or instruction to do something

bid (verb)	bidder (verb)
ask someone in a friendly way to do something
invoke upon
ask for or request earnestly
propose a payment
make a demand, as for a card or a suit or a show of hands
make a serious effort to attain something