(and ponies)
The white horse Theoden gifts to Gandalf in return for his services
Shadowfax
The common Sindarin name for the (definitely not volcano) fiery mountain in Mordor
Orodruin
The name of Gandalf's sword from Gondolin
Glamdring
The 4th member of the hobbit's conspiracy, who stays at crickhollow instead of leaving with the other hobbits
Fredegar (Fatty) Bolger
The father of Elrond, who sails the sky as a star
The two horses Éomer lends Aragorn and Legolas to help them search for their captured friends
Hasufel and Arad
The location of the entmoot Treebeard takes Merry and Pippin to
Derndingle
The name of Galadriel's Great Ring
Nenya
The chief of the Woses, who leads Theoden on a secret pass to the Pelennor
Ghân-buri-ghân
The twins sons of Elrond
Elrohir and Elladan
The pony Merry is gifted by Theoden when they journey to Dunharrow
Stybba
The Sindarin names for the Hill of Seeing and the Hill of Hearing
Amon Hen and Amon Lhaw
The name of Éomer's sword
Gúthwinë
A soldier of Erkenbrand, who helps defend Helm's Deep and speaks the Dunland tounge
Gamling
The Elf who meets Frodo, Sam, and Pippin in the woods of the Shire
Gildor
Aragorn's horse, which Halbarad returns after the Battle of Helm's Deep
Roheryn
The vast plain in the northeast of Mordor
The Plateau of Gorgoroth
Aragorn’s gift to Arwen as a sign of their betrothal
Ring of Barahir
The three named members of Faramir's company
Mablung, Damrod, and Anborn
The two brothers of Haldir
Rúmil and Orophin
The horse of the Elf who's actions are very reminiscent of Gandalf's
Asfaloth
The inn Frodo, Sam, and Pippin skip in their disastrous shortcut to mushrooms
The Golden Perch
The name of Gil-galad's spear
Aeglos
A Gondorian who works at the storehouse and buttery in Minas Tirith
Targon
The chief councilor in Rivendell, who takes part in the Council of Elrond
Erestor