Gnomish
urc
noun. wolf
harog
noun. wolf
harw
noun. wolf
orc
noun. goblin
ulug
noun. wolf
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 for “wolf” in the Gnomish Lexicon of the 1910s (GL/75), likely related to ᴱQ. ulku “wolf” from the contemporaneous Qenya Lexicon derived from the early root ᴱ√ULUKU (QL/97). In the Qenya Lexicon Tolkien gave the Gnomish form as ulug, but in the Gnomish Lexicon the gloss of G. ulug was changed {“wolf” >>} “dragon” (GL/74).