"omnibuses" in the noun sense
1. omnibus
an anthology of articles on a related subject or an anthology of the works of a single author
2. bus, autobus, coach, charabanc, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle
a vehicle carrying many passengers used for public transport
"he always rode the bus to work"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License