WordNet sense 1 ((sports) someone in charge of training an athlete or a team):

handler, manager

WordNet sense 2 (a person who gives private instruction (as in singing or acting)):

tutor, private instructor

WordNet sense 3 (a railcar where passengers ride):

carriage, passenger car

WordNet sense 4 (a carriage pulled by four horses with one driver):

four-in-hand, coach-and-four

WordNet sense 5 (a vehicle carrying many passengers; used for public transport):

bus, double-decker, jitney, omnibus, autobus, charabanc, motorbus, motorcoach, passenger vehicle

WordNet sense 6 (teach and supervise (someone); act as a trainer or coach (to), as in sports):

train