Early Quenya
wembil
noun. worm
wembe
noun. worm
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 appearing as ᴱQ. {wembe >>} ’wembe “worm” in the Qenya Lexicon of the 1910s under the early root ᴱ√GWEVE; it had a longer variant *’wembil** (QL/103). Wembe “worm” was also mentioned in the contemporaneous Poetic and Mythological Words of Eldarissa* (PME/103).
Neo-Quenya: Helge Fauskanger adapted this word as ᴺQ. vembë “worm” in his NQNT (NQNT), and I follow his suggestion in part for better compatibility with adapted Gnomish forms from the Neo-Root ᴺ√WEB.