coach1
  
  n.
    - Brit. a comfortably equipped single-decker bus used for longer journeys.
- a railway carriage.
- 
(also coach class)
 N. Amer. economy-class seating in an aircraft or train.
- a closed horse-drawn carriage.
v.
 travel or convey by coach.
Derivative
  
  Etymology
  C16: from Fr. coche, from Hungarian kocsi (szekér) ‘(wagon) from Kocs’, a town in Hungary.
 
  
    
coach2
  
  n.
   - an instructor or trainer in sport.
- a tutor who gives private or specialized teaching.
- Austral. another term for coacher.
v.
 train or teach as a coach.
Etymology
  C18: figuratively from coach1.