A noun in the Qenya Lexicon of the 1910s glossed “lump, knob” as a derivative of the early root ᴱ√PULU “swell” (QL/75).
Early Quenya
tupse
noun. lump, knob
pulme
noun. lump, knob
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.
Qenya cognate of ᴱN. tuf “lump, knob” from Early Noldorin Word-lists of the 1920s, and so probably of a similar meaning (PE13/154). In later writings, ᴹQ. tupse = “thatch” (Ety/TUP).