trolley coach vs charabanc

trolley coach and charabanc both are nouns.

Word	Noun	Adjective	Verb	Adverb
trolley coach	Yes	No	No	No
charabanc	Yes	No	No	No

As nouns, charabanc is a hypernym of trolley coach; that is, charabanc is a word with a broader meaning than trolley coach:

trolley coach: a passenger bus with an electric motor that draws power from overhead wires
charabanc: a vehicle carrying many passengers; used for public transport

Other hypernyms of trolley coach include autobus, bus, coach, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle.

trolley coach (noun)	charabanc (noun)
a passenger bus with an electric motor that draws power from overhead wires	a vehicle carrying many passengers; used for public transport