(n.) One who speculates in stocks for gain; one whose occupation is to buy and sell stocks. In England a jobber acts as an intermediary between brokers.

Realtor Wall Streeter agent arbitrator bill broker bond crowd cambist connection contact cotton broker curb broker dealer diamond broker discount broker distributor estate agent floor broker floor trader floorman furniture broker go-between grain broker hotel broker insurance broker interagent interceder intercessor intermediary intermediate intermediator intermedium internuncio interpleader jobber land broker liaison link mediary mediator medium middleman money broker money changer mortgage broker negotiant negotiator note broker odd-lot dealer pawnbroker pit man real estate agent real estate broker registered representative sharebroker ship broker specialist stock dealer stock-exchange broker stockbroker stockjobber tie two-dollar broker wholesaler