Nornhabar

Nornhabar ("Dwarrowdelf") is an Elvish name of Khazad-dûm (later known as Moria) in The Later Quenta Silmarillion manuscripts in the 1950s (cf. The History of Middle-earth XI, p. 206, 209).

Later on, in the essay Quendi and Eldar Nornhabar was replaced by Hadhodrûd which was quite immediately changed to Hadhodrond> - a form that entered into the printed Silmarillion (cf. ibid., p. 386, 419 [note 21]).

The elements of the Sindarin name are likely Norno "Dwarf" (< norna adj. "stiff, tough") and sabar "mine".