charabanc vs motorbus

charabanc and motorbus both are nouns.

Word	Noun	Adjective	Verb	Adverb
charabanc	Yes	No	No	No
motorbus	Yes	No	No	No

As nouns, charabanc and motorbus are synonyms defined as:

charabanc and motorbus: a vehicle carrying many passengers; used for public transport

Other synonyms of charabanc include autobus, bus, coach, double-decker, jitney, motorcoach, omnibus, passenger vehicle.

charabanc (noun)	motorbus (noun)
a vehicle carrying many passengers; used for public transport	a vehicle carrying many passengers; used for public transport