Catsuit and Unitard

Unitard and catsuit are semantically related. In some cases you can use "Unitard" instead a noun "Catsuit".

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.

Catsuit and unitard are semantically related. Sometimes you can replace term "Catsuit" with "Unitard", this nouns are similar.