A word appearing as ᴱQ. tūrion (túriond-) or turindo “palace” in the Qenya Lexicon of the 1910s under the early root ᴱ√TURU “am strong” (QL/95). The contemporaneous Poetic and Mythological Words of Eldarissa had ᴱQ. tūriond- “palace” (PME/96).
Neo-Quenya: I would use ᴺQ. túrion as “palace” for purposes of Neo-Quenya, since the root √TUR “master(y), strong” survived on Tolkien’s later writing. This word was used, for example, in Helge Fauskanger’s NQNT (NQNT). ABNW (ABNW) from the early 2000’s proposed a different neologism: ᴺQ. arcöa “palace”, a combination of ar(a)- “noble” and cöa “house”.
túrion (túriond-) noun "palace" (QL:95)