[1] : The Collaborative International Dictionary of English v.0.48

trader \trad"er\, n.
   1. one engaged in trade or commerce; one who makes a business
      of buying and selling or of barter; a merchant; a
      trafficker; as, a trader to the east indies; a country
      trader.
      1913 webster

   2. a vessel engaged in the coasting or foreign trade.
      1913 webster

[2] : WordNet (r) 2.0

trader
     n : someone who purchases and maintains an inventory of goods to
         be sold syn: bargainer, dealer, monger
see also:
bargainer dealer monger 

[3] : Moby Thesaurus II by Grady Ward, 1.0

29 moby thesaurus words for "trader":
   broker, businessman, buyer, chandler, dealer, distributor,
   importer, jobber, marketer, merchandiser, merchant, middleman,
   monger, purchaser, regrater, retail dealer, retail merchant,
   retailer, salesman, salesperson, saleswoman, seller, shopkeeper,
   storekeeper, tradesman, tradeswoman, trafficker, vendor,
   wholesaler

Trader >> T Words
Trader, definition of term: Trader
trader_pag1.html

Sole Trader >> S Words
Sole Trader, definition of term: Sole Trader
sole+trader_pag1.html

Free Trader >> F Words
Free Trader, definition of term: Free Trader
free+trader_pag1.html