In the first was a race terrible to see
forged for war from older stock they be.
It’s Quenya for those out of the cold
fought best by Dwarves oh so bold.
Uruloki
(Bobbins listed this as Uroloki)
Urulókë (plural Urulóki) is the Quenya name of the fire-drakes, meaning "fire-serpent".
Tolkien Gateway: Urulókë