Early Quenya
tompo-
verb. to bang
tompo-tompo
noun. noise of drums (or guns)
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.
tompo-
verb. to bang
tompo-tompo
noun. noise of drums (or guns)
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.
An onomatopoeic word for the “noise of drums (or guns)” in the Qenya Lexicon from the early root ᴱ√TOMPO (QL/94).
Neo-Quenya: I think this word might be salvaged in Neo-Quenya as a derivative of the later root √TOM for “resonant sounds” (PE17/138).