Wetsuit and Wet suit

Wet suit and wetsuit are semantically related. In some cases you can use "Wet suit" instead a noun "Wetsuit".

Wet suit noun - A close-fitting garment made of a permeable material; worn in cold water (as by skin divers) to retain body heat.

Wetsuit and wet suit are semantically related. You can use "Wetsuit" instead a noun phrase "Wet suit".