The Collaborative International Dictionary of English v.0.48:

Pullman car \Pull"man car`\ [Named after Mr. Pullman, who
   introduced them.]
   A kind of sleeping car; also, a palace car; -- often
   shortened to Pullman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Pullman car
    n 1: luxurious passenger car; for day or night travel [syn:
         Pullman, Pullman car]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "Pullman car":
   Pullman, baggage car, boxcar, caboose, car, carriage, chair car,
   coach, coal car, covered waggon, day coach, diner, dinghy,
   dining car, drawing room, flat, flatcar, gondola, local,
   luggage van, mail car, mail van, palace car, parlor car,
   passenger car, railway car, reefer, refrigerator car, roomette,
   saloon, sleeper, smoker, smoking car, stateroom, stockcar, tank,
   tender, truck, van, waggon