So the word PEPLUM is more encompassing and therefore more useful and, well, it just sounds right. To many film snobs though, a PEPLUM is a lower-grade European/Italian made film and to use the word PEPLUM for a Hollywood super-production like THE TEN COMMANDMENTS or BEN-HUR is wrong and an insult. Well, I disagree.
Drywall is a panel made of gypsum plaster pressed between two thick sheets of paper. It is used to make interior walls and ceilings. Drywall construction became prevalent as a speedier alternative to traditional lath and plaster. Sheetrock is a trademark for drywall made by the US Gypsum company. What it is.
Medium-density fiberboard (MDF) is an engineered wood product formed from wood fibers obtained from breaking down hardwood and softwood with a defibrator. The wood fibers are then glued together using wax and resin adhesive. They are made into panels by applying high temperature and pressure. The resulting smooth wood product has no wood grain and shares many characteristics with particle board. However, MDF is slightly stronger particle board.