*"Gipsy" is the spelling that was used in 19th century England. Kenneth Grahame in "the Wind in the Willows" uses this spelling.
Caravan is the English word for what we in the USA call a trailer. Some other words that have been to describe the same vehicles are "wagon, waggon, van, caravan and living wagon" We describe our trailer as a tiny home on wheels, or as a caravan designed after the 19th century wagons built in Reading, England. Such caravans were primarily built for the English Romani (sometimes spelled Romany or written as Roma) people. The Romani word for a horse drawn living wagon is 'vardo'. This word is sometimes used to describe any trailer with a curved roof.