WordNet (r) 3.0 (2006):

cabdriver
    n 1: someone who drives a taxi for a living [syn: taxidriver,
         taximan, cabdriver, cabman, cabby, hack driver,
         hack-driver, livery driver]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "cabdriver":
   Jehu, Sunday driver, backseat driver, bullwhacker, bus driver,
   busman, cabby, cabman, cameleer, carter, cartman, charioteer,
   chauffeur, coachman, coachy, cocher, cochero, drayman, driver,
   elephant driver, gharry-wallah, hack, hackdriver, hackman, hacky,
   harness racer, hit-and-run driver, jitney driver, joyrider, mahout,
   motorist, mule skinner, muleteer, reinsman, road hog, skinner,
   speeder, stage coachman, taxidriver, teamster, truck driver,
   trucker, truckman, vetturino, voiturier, wagoner, wagonman, whip