Diving suit and Wet suit

Diving suit noun - A weighted and hermetically sealed garment supplied with air; worn by underwater divers.

Wet suit and diving suit are semantically related. In some cases you can use "Wet suit" instead a noun phrase "Diving suit".

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

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