RV is an umbrella term. Camper can describe several compact recreational vehicles, while a motorhome is usually a motorised vehicle with an integrated living area. A caravan is normally towable.
RV is the broadest term
RV means recreational vehicle and can include motorhomes, camper vans, caravans and other mobile living vehicles.
Camper van: compact and mobile
A camper van keeps the living space inside a van platform. It is usually easier to park than a larger motorhome and can work well for couples or smaller groups.
Motorhome: more dedicated living space
A motorhome typically has more interior volume for a permanent or semi-permanent bed, kitchen, bathroom, storage and larger utility systems.
Caravan: tow the living unit
A caravan or travel trailer is towed behind another vehicle. The advantage is that the accommodation can stay at camp while the tow vehicle is used separately.
Pickup camper: removable or compact truck-based living
A pickup camper or truck camper is carried by a pickup platform. Some slide-in campers can be removed when the truck is needed for normal use.
Compare the options on our RV & Camper UAE page.