Early Quenya
keallume
adverb. *ten times
kellume
adverb. *ten times
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 word appearing as ᴱQ. kellume or keallume “✱ten times” in the Early Qenya Grammar of the 1920s, a combination of ᴱQ. kea “ten” and ᴱQ. -llume “times” (PE14/51, 84).
Neo-Quenya: Since I prefer quëan “ten” from Tolkien’s later writings, I would update this form to ᴺQ. quëallumë “ten times” for purposes of Neo-Quenya.