Númen(n)órë noun "people of the west", confused with Númendor "land of the west" (SA:dôr); hence Númenor as the name of the great isle given to the Edain by the Valar (FS, LR:56); full form Númenórë (LR:47, SD:247, NDŪ); allative númenórenna "to Númenor" (LR:56)
Quenya
númenórë
place name. Westernesse, (lit.) West-land
Númen(n)órë
people of the west
númenor
Númenor
Mairon
the admirable
Mairon, masc. name "the Admirable" (cf. adj. maira), said to be the original name of Sauron, changed when he was suborned by Melkor, "but he continued to call himself Mairon the Admirable, or Tar-mairon King Excellent, until after the downfall of Númenor" (PE17:183). Since Sauron had joined Melkor before the Elves came to Valinor and developed the Quenya language, we are perhaps to understand that Mairon is a translation by sense of Saurons original Valarin name, though Sauron himself may seem to have used the Elvish form in Middle-earth and on Númenor.
Núaran
west-king
Núaran noun "West-king"; Núaran Númenoren "West-king of Númenor"; changed (according to LR:71) to Núraran Númenen, *"West-king of the West" (all of this is "Qenya" with genitive in -n instead of -o, as in Tolkien's later Quenya) (LR:60)
Tarcil
high-man
Tarcil ("k") (#Tarcild-, as in pl. Tarcildi) masc. name, "high-Man", also used as a term for Númenórean (Appendix A, TUR, KHIL, VT46:17, PE17:101; the latter source provides the gloss "Great Man of Numenor"; tarcil(di) = "high-men = Elf-friends of Númenor"). Cf. the variant tarhildi, q.v.
atalantë
downfall, overthrow, especially as name [atalantë] of the [downfallen] land of númenor
atalantë noun "downfall, overthrow, especially as name [Atalantë] of the [downfallen] land of Númenor" (DAT/DANT, TALÁT, Akallabêth, SD:247, 310; also LR:47, VT45:26). Variant atalantië "Downfall", said to be a normal noun-formation in Quenya (Letters:347, footnote). From the common noun atalantë "collapse, downfall" is derived the adj. atalantëa "ruinous, downfallen", pl. atalantië in Markirya (changed to sg. atalantëa this change does not make immediate sense, since the adjective undoubtedly modifies a plural noun, but Tolkien does not always let adjectives agree in number).
nessamelda
noun. species of tree in Númenor, (lit.) beloved of Nessa
The island-continent where the Edain settled after the fall of Beleriand (LotR/1035, S/261), often appearing in its shorter form Númenor. It is generally translated as “Westernesse” (LotR/194, S/261) but more literally means “West-land” (Let/224, RC/778). It is a compound of númen “west” and nórë “land” (Let/361).
Conceptual Development: In the very first draft of the Fall of Númenor, this name was given as ᴹQ. Númar or ᴹQ. Númenos (LR/11), but in the next draft these became the name its capital city, and the name Númenor emerged as the name of the land (LR/14). The full form ᴹQ. Númenóre appeared in The Etymologies, already with the derivation discussed above (Ety/NDŪ). It also appeared in an adjectival form Númenórea in linguistic notes from the 1930s (PE22/19).