Another name for Ungweliante in the earliest Lost Tales (LT1/151), likely a derivative of the root ᴱ√MORO.
Early Quenya
muru-
verb. to slumber, sleep
lor-
verb. to slumber
móru
feminine name. Primeval Night
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 verb for “to 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).