Sulfuron

In Warcraft Lore, the word "Sulfuron" refers to more than one thing.
*Sulfuron Hammer - An epic weapon, needed for the legendary weapon Sulfuras, Hand of Ragnaros.
*Sulfuron Harbinger - A boss in the Molten Core.
*Sulfuron Ingot - A reagent needed to forge the aforementioned Sulfuron Hammer.
*Sulfuron Keep - Ragnaros' stronghold in the Firelands, in the Elemental Plane.
*Sulfuron Spire - Ragnaros' stronghold in Mount Hyjal.