Word Study
boxcar
OXFORD DICTIONARY
boxcar, n. US an enclosed railway goods wagon, usu. with sliding doors on the sides.
THESAURUS
boxcar
Pullman, Pullman car, baggage car, 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, sleeper, smoker, smoking car, stockcar, tank, tender, truck, van, waggonFor further exploring for "boxcar" in Webster Dictionary Online