Early Primitive Elvish
pete
root. *knock, hammer
oto
root. knock
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.
An unglossed root in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. penta “nose, beak (probably of such birds as woodpeckers)”, ᴱQ. pete- “knock, strike”, and ᴱQ. petl “hammer” (QL/73). Later nose, knock and hammer words were derived from other roots.