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

losc

noun. rye

A noun appearing as G. losc or losg “rye” in the Gnomish Lexicon of the 1910s (GL/54).

Neo-Sindarin: Although the derivation of this Gnomish word is unclear, it doesn’t conflict with any later words, so I think it can be salvaged as ᴺS. losc “rye” for purposes of Neo-Sindarin.

losg

noun. rye


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.