Bus ...
From Wikipedia, the free encyclopedia

A bus (archaically also omnibus or autobus) is a road vehicle designed to carry passengers. A bus can generally seat a maximum of anywhere from 8 to 300 passengers. Buses are the most widely used form of public transportation, although they are also used in tourism and as private transport.

Coach (vehicle) ...
From Wikipedia, the free encyclopedia

In British and Australian English, the term coach is used to refer to a large motor vehicle for conveying passengers. To differentiate from other types of bus, a coach has a luggage hold separate from the passenger cabin. Also, whereas other buses are primarily used to transport commuters relatively short distances within the same city, coaches are more used for longer trips between cities - or even between countries - where passengers may pre-book tickets for a specific journey. The term coach implies a higher level of comfort than bus, and for that reason appears in the formal names of many bus companies in the US.

Bus Transport Sector ...
Found on 1800miti.Com, the Commerce Directory

This industry comprises establishments primarily engaged in providing bus passenger transportation over regular routes and on regular schedules, as well as chartered services on a non-scheduled basis.

A Bus may also be known as: an autobus, coach, charabanc, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle (a vehicle carrying many passengers; used for public transport)