Gypsum board and Wallboard

Gypsum board noun - Wallboard with a gypsum plaster core bonded to layers of paper or fiberboard; used instead of plaster or wallboard to make interior walls.

Wallboard and gypsum board are semantically related. in wall material topic. In some cases you can use "Wallboard" instead a noun phrase "Gypsum board".

Wallboard noun - A wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses.

Gypsum board and wallboard are semantically related. Sometimes you can replace phrase "Gypsum board" with "Wallboard", this terms are similar.