Gnomish
saur
noun. hound, wild dog
hûbi
noun. hound
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.
The word G. saur “hound, wild dog” appeared in the Gnomish Lexicon of the 1910s (GL/67), probably a cognate of ᴱQ. savar “wild dog, jackal” under the early root ᴱ√SAẆA (QL/82).
Neo-Sindarin: For purposes of Neo-Sindarin, I’d update this word to ᴺS. huar “wild dog” using the later root ᴹ√KHUG that seems to have replaced ᴱ√SAẆA (Ety/KHUGAN); compare to ᴺQ. huar of similar meaning.