Body suit and Unitard

Body suit noun - A tight-fitting garment of stretchy material that covers the body from the shoulders to the thighs (and may have long sleeves or legs reaching down to the ankles); worn by ballet dancers and acrobats for practice or performance.

Unitard is a synonym for body suit. In some cases you can use "Unitard" instead a noun phrase "Body suit".

Unitard noun - A tight-fitting garment of stretchy material that covers the body from the shoulders to the thighs (and may have long sleeves or legs reaching down to the ankles); worn by ballet dancers and acrobats for practice or performance.

Body suit is a synonym for unitard. You can use "Body suit" instead a noun "Unitard".