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.
umbe
noun. dale, dell
nal
noun. dale, dell
In the Qenya Lexicon of the 1910s there were a pair of similar nouns derived from the root ᴱ√NḶĐḶ: ᴱQ. nal (nald-) “dale, dell” and ᴱQ. nalle “dell” (QL/66). The latter was derived from ᴱ✶nḷdle and the former probably from ✱nḷd-. The word nalle also appeared unglossed in Early Qenya Word-lists from the 1920s (PE16/144).
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 Qenya Lexicon of the 1910s glossed “dale, dell” derived from the root ᴱ√Ū “under” (QL/96). It may have reemerged later as ᴹQ. imbe “dell, deep vale” (EtyAC/IMBE).