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.

Gnomish

govron

noun. acorn

gronoch

noun. acorn

A word in the Gnomish Lexicon of the 1910s glossed “acorn”, a combination of G. grôn “oak” and G. nocha “an acorn” (GL/42, 62).

nocha

noun. acorn

A noun appearing as G. nocha “an acorn” in the Gnomish Lexicon of the 1910s (GL/61). It had no obvious Qenya cognate, so its derivation is unclear.

Neo-Sindarin: Since there are no later words for “acorn”, I would adapt this word as ᴺS. noch “acorn” for purposes of Neo-Sindarin.

Gnomish [GL/42; GL/61] Group: Eldamo. Published by

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.