CHARABANC
bus, autobus, coach, charabanc, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle
(noun) a vehicle carrying many passengers; used for public transport; “he always rode the bus to work”
Source: WordNet® 3.1
Etymology
Noun
charabanc (plural charabancs)
(British, historical) A horse-drawn, and then later, motorized omnibus with open sides, and often, no roof.
Synonym: chara (short form)
Verb
charabanc (third-person singular simple present charabancs, present participle charabancing, simple past and past participle charabanced)
(rare, ambitransitive) To travel or convey by charabanc.
Source: Wiktionary
Char`-a-banc", n.; pl. Chars-a-banc. Etym: [F.]
Definition: A long, light, open vehicle, with benches or seats running
lengthwise.
Source: Webster’s Unabridged Dictionary 1913 Edition