The Collaborative International Dictionary of English v.0.48:

Salesman \Sales"man\ (s[=a]lz"man), n.; pl. Salesmen (-men).
   [Sale + man.]
   One who sells anything; one whose occupation is to sell goods
   or merchandise.
   [1913 Webster]

WordNet (r) 3.0 (2006):

salesman
    n 1: a man salesperson

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "salesman":
   agent, clerk, floorwalker, sales agent, sales engineer,
   sales force, sales manager, sales personnel, salesclerk, salesgirl,
   saleslady, salespeople, salesperson, saleswoman, scalper, seller,
   selling agent, shop assistant, shop clerk, store clerk,
   ticket scalper