Early Quenya
telu-
verb. to finish, end, close, complete; to cover, roof
telu
noun. end (fate), close
tel
noun. roof
telume
noun. the heavens, (vault of) heaven, firmament
oilima
adjective. last
taitelúme
noun. firmament
talma
noun. end
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
An unglossed word in a draft of the Oilima Markirya poem from around 1930 given as taiteluume- “firmanent” (PE16/77), probably a combination of some derivative of ᴱ√TAHA “✱high” and ᴱQ. telume “firmanent, heavens”, as suggested by Gilson, Welden and Hostetter (PE16/79).