Gnomish
sôn
noun. craft, skill
sôn
adjective. pure, clean
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.
A noun in the Gnomish Lexicon of the 1910s glossed “craft, skill”, related to G. sana- “know how to” (GL/67-68). Tolkien indicated it applied to “all senses” of the words, so presumably it applied to both physical and mental skills. Tolkien labeled this noun with a “²” to distinguish it from the adjective G. sôn “clean”.