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.
clog
noun. stone (small)
habach
noun. big shoe, clog, sabot
cloch
noun. stone (small), stone of fruit
clochiol
adjective. stone
An adjective for “stone” in the Gnomish Lexicon of the 1910s appearing as an element in G. gôf·clochiol “stone-fruit” (GL/40), derived from G. cloch “a stone” (GL/26).
gond
noun. stone
sarn
noun. a stone
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.
A noun for “a stone” in the Gnomish Lexicon of the 1910s with variant forms clog and cloch, also used for the stone (large hard seed) of a fruit, especially in its form cloch (GL/26).