Lugbúrz
From Tolkien Gateway
Lugbúrz was a name of the Dark Tower of Barad-dûr. This was its name in the Black Speech, and so was the form actually used by the servants of Sauron, and presumably by Sauron himself.
Lugbúrz was a name of the Dark Tower of Barad-dûr. This was its name in the Black Speech, and so was the form actually used by the servants of Sauron, and presumably by Sauron himself.