railcar
/ˈreɪlkɑː(r)/noun
1- Brit. a powered railway passenger vehicle designed to operate singly or as part of a multiple unit〈英〉（单独或成列运行的）机动有轨车。
1.1
rail car
N. Amer. any railway carriage or wagon〈北美〉（火车）客车厢, 货车厢。