dealer vs bargainer

dealer and bargainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
dealer	Yes	No	No	No
bargainer	Yes	No	No	No

As nouns, dealer and bargainer are synonyms defined as:

dealer and bargainer: someone who purchases and maintains an inventory of goods to be sold

Other synonyms of dealer include monger, trader.

dealer (noun)	bargainer (noun)
a firm engaged in trading	someone who purchases and maintains an inventory of goods to be sold
a seller of illicit goods	negotiator of the terms of a transaction
the person who distributes the playing cards in a card game
someone who purchases and maintains an inventory of goods to be sold
the major party to a financial transaction at a stock exchange; buys and sells for his own account