Yes, that's a D for Laurelindhe ilmarin, two Es for Bugyfeanor, an H for Melian, an N for Loni, an O for Elfstone, two Rs for Peredhil, and an M and a T for Stonehelm.
And now it reads:
M E R E T H R O N D
Sorry, nary an A, B , C , G, I, L, P, Q, S nor W
Though Laurelindhe ilmarin guessed the last letter, she didn't recognize she had the answer, which Frodo_baggins thought he did.
Yes, Merethrond is Minas Tirith's Great Hall of Feasts - from second page, Chapter 6 'Many Partings', Book VI, RotK
Your turn Frodo_baggins, unless you wish to pass the honor on to someone else.
'Share and enjoy'