Qenya
ungo
noun. cloud, dark shadow
tolto
cardinal. eight
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.
A noun in The Etymologies of the 1930s glossed “cloud, dark shadow” derived from the root ᴹ√UÑG (Ety/UÑG) and serving as the initial element in ᴹQ. Ungoliante “Gloomweaver” (LR/230). In later writings, √UÑG referred to spiders instead (LotR/1122; PE22/160), so this word was probably abandoned.