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.
ráka
noun. wolf
narmo
noun. wolf
A noun for “wolf” in The Etymologies of the 1930s derived from the root ᴹ√ÑGARAM (Ety/ÑGAR(A)M), apparently a variant of ᴹ√ÑGAW “howl”. It seems narmo is a word for an ordinary wolf, as opposed to nauro “werewolf”.
Conceptual Development: A similar (but rejected) form ᴹQ. harma “wolf” appeared under the deleted root ᴹ√ƷARAM (Ety/ƷARAM).
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 for “wolf” in The Etymologies of the 1930s derived from primitive ᴹ✶d’rāk under the root ᴹ√DARAK (Ety/DARÁK), where the ancient initial dr became r as usual for Quenya (PE19/37).
Conceptual Development: Earlier words for “wolf” of similar form include ᴱQ. ulku and feminine ᴱQ. ulqi “she-wolf” appearing in the Qenya Lexicon of the 1910s under the early root ᴱ√ULUKU (QL/97).