Dry wall and Gypsum board

Dry wall 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 dry wall are semantically related. In some cases you can replace phrase "Gypsum board" with "Dry wall", this phrases are similar.

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.

Dry wall and gypsum board are semantically related. You can use "Dry wall" instead a noun phrase "Gypsum board".