The dwarf kingdom beneath the Misty Mountains in J.R.R. Tolkien’s Middle-earth is Khazad-dûm.
Khazad-dûm is the Dwarves’ own name for the vast underground realm later known as Moria. It was founded by Durin the Deathless beneath the Misty Mountains and grew into the greatest of the Dwarven mansions. Its wealth included mithril, a remarkably valuable metal found in the mines.
The Dwarves delved too deeply and awakened a Balrog, known as Durin’s Bane. The disaster drove the surviving Dwarves from Khazad-dûm, leaving the halls abandoned and dangerous. By the time of The Fellowship of the Ring, Orcs occupy the ruins and the Fellowship must cross them while traveling through Moria.
Erebor is another Dwarven kingdom, the Lonely Mountain in The Hobbit. Dale is the nearby human city, while Gondolin was an Elven city of the First Age. These names belong to different places and periods of Tolkien’s history.