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.
nel
adverb. thrice
nelma
noun. needle
nel(de)kainen
cardinal. thirty
The Early Qenya Grammar (EQG) of the 1920s had ᴱQ. nel(de)kainen “thirty” as a combination of ᴱQ. nelde “three” and ᴱQ. kainen “ten” (PE14/49, 83).
Neo-Quenya: Late in Tolkien’s life, Tolkien changed the Quenya word for “ten” to quëan or quain, which has been the basis for various neologisms for “thirty”: ᴺQ. nelequëan, ᴺQ. nelequain, or ᴺQ. nelquain. I prefer to use ᴺQ. nelquain for purposes of Neo-Quenya.
neldest(y)a
adjective. one third
neldesto
fraction. one third
nele
noun. tooth
nelkea
cardinal. thirteen
nyat
noun. tooth
ole
cardinal. three
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. nelma “needle” in the Qenya Lexicon of the 1910s, but Tolkien vacillated on whether it was derived from the early root ᴱ√NELE “point” or ᴱ√NEME “✱sew” (QL/65). As a derivative of ᴱ√NEME, Tolkien considered an alternate form nemya. The word nelma “needle” also appeared in the contemporaneous Poetic and Mythological Words of Eldarissa (PME/65).
Neo-Quenya: I would retain ᴺQ. nelma “needle” for purposes of Neo-Quenya, but as a derivative of √NEL since √NEM “sew” did not survive in Tolkien’s later writing. In Quenya of the 1930s and later, the root √NEL was generally glossed “three”, but was still associated with pointed things like in √NELEK “tooth” due to triangular shapes.