trader vs bargainer

trader and bargainer both are nouns.

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

As nouns, trader and bargainer are synonyms defined as:

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

Other synonyms of trader include dealer, monger.

trader (noun)	bargainer (noun)
someone who purchases and maintains an inventory of goods to be sold	someone who purchases and maintains an inventory of goods to be sold
	negotiator of the terms of a transaction