Belegost

No, it's dwarves.

Uh, the dwarves of the great mansions of Nogrod and Belegost.

Uh, Belegost meaning great fortress from beleg, strong, ost, fortress.

Same as Osgiliath and Fornost, which we've covered to death.

Don't worry about it.

And when the second age of captivity of Melkor had passed, she counselled Thingol that the peace of Arda would not last forever.

He took thought, therefore, how he should make himself a kingly dwelling and a place that should be strong if evil were to awake again in Middle-earth.

And he sought aid and counsel of the dwarves of Belegost.