A jumpsuit is an overall one-piece with a covering for legs and hands. Originally used by parachuters, hence the name jumpsuit, it made its way to the fashion world due to the comfort, flexibility, and ease it offers.
A playsuit is the shortest version of a jumpsuit with a regular fit. Hence it is perfect party wear to show off your legs in the best possible manner. A romper is similar to a playsuit but is very comfortable to wear as it has a relaxed fit, unlike a playsuit.