ilwë noun "sky, heavens" (LT1:255), "the middle air among the stars" (LT1:273). VT49:51, 53 also mentions an obscure prononominal element ilwë.
Quenya
Menel
heavens
ilwë
sky, heavens
hellë
sky
hellë noun "sky" (3EL; a distinct word hellë "frost" was struck out, see KHEL.)
telumë
dome, roof, canopy
telumë noun "dome, roof, canopy" (TEL/TELU, WJ:411 cf. 399; see also telluma); "firmament" (MC:214), inflected telumen in MC:221 (the latter is "Qenya"). Telumehtar "warrior of the sky", older name of Menelmacar = Orion (Appendix E, TEL/TELU, WJ:411); Telumendil *"Sky-friend", name of a constellation (Silm)
telluma
dome, copula
telluma noun "dome, copula", especially the "Dome of Varda" over Valinor, but also applied to the domes of the mansion of Manwë and Varda upon Taniquetil. Adopted from Valarin _delgūmā under the influence of pure Quenya telumë (WJ:399, 411). Pl. tellumar is attested (Nam, RGEO:66)_.
Menel noun "heavens" (Markirya, SA), "the heavens, the firmament" (SD:401), "the apparent dome in the sky" (MR:387). Menel Cemenyë ("k") "Heaven and Earth" (VT47:30). Found in names like Meneldil "Heaven-friend" = astronomer (Appendix A; Letters:386), Meneldur masc. name, "Heaven-servant" (Appendix A, Tar-Menelduras a Númenórean King, UT:210); menelluin "sky-blue", used as noun = "cornflower" (J.R.R. Tolkien: Artist & Illustrator p. 193). Menelmacar "Swordsman of the Sky", the Orion constellation (also called Telumehtar, Appendix E, first footnote); the older name was Menelmacil "Heaven-sword" (WJ:411); Meneltarma "Pillar of Heaven", name of the great central mountain of Númenor (SA:tar, VT42:21).Menelya fifth day of the Eldarin six-day week, dedicated to the heavens (Appendix D) Locative meneldë "in heaven"; abandoned forms menellë, menelzë (VT43:12, 16). Adj. meneldëa "(being) in heaven", evidently based on a locative form meneldë "in heaven"; abandoned forms menelzëa, menellëa, menelessëa (VT43:13, VT44:16; the last of these forms would suggest the locative form #menelessë).