Gnomish
gund
noun. boil, pus
hunn
noun. boil, pus
lingwir
noun. dragon
ulug
noun. dragon
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 in the Gnomish Lexicon with variants G. gund, hunn and glosses “a boil, pus”, derived from the early root ᴱ√gudh having to do with heat and burning (GL/42).
Neo-Sindarin: Since it seems ᴱ√gudh >> √UR “heat, be hot”, I’d update this word to ᴺS. ordh “boil, pus” < ✱urdā = “(orig.) the product of burning”.