The Gnomish Lexicon of the 1910s had G. drui or drû “wood, forest”; Tolkien specified it was not used of wood a material (GL/31). This Gnomish word may be related to the root ᴱ√TUÐU “kindle”; see that entry for details. In Early Noldorin Word-lists it appeared as ᴱN. dron “wood” (PE13/142).
Early Noldorin
taur
noun. forest
taur-na-fuin
place name. Deadly Nightshade
tavros
masculine name. Lord of Forests
aulos
noun. forest
dron
noun. wood
dâ
adjective. high
A word glossed “high” in Early Noldorin word lists of the 1920s derived from ᴱ✶dagá (PE13/141, 161). The Gnomish Lexicon of the 1910s also had G. dâ “high” (GL/29), while the Gnomish Lexicon Slips modifying that document had G. da “high” also derived from ᴱ✶dagá (PE13/112). In Tolkien’s later writings, the root became √TĀ/TAƷ, so these d-forms would have been abandoned.
tathrin
noun. willow
tîr
noun. king
See later N. Taur-na-Fuin and S. Taur-nu-Fuin for discussion.