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.
lor-
verb. to slumber
fum-
verb. to sleep
murme
noun. slumber, sleep
A noun for “slumber” in the Qenya Lexicon of the 1910s under the early root ᴱ√MURU of the same meaning (QL/63). It also appeared with the gloss “sleep” in the contemporaneous Poetic and Mythological Words of Eldarissa (PME/63).
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 verb for “sleep” in the Qenya Lexicon of the 1910s derived from the early root ᴱ√FUMU of the same meaning (QL/39). An unglossed verb hum- on a page of Qenya Verb Forms from the 1910s might be another iteration of this verb (PE14/28).