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.
bleg
noun. a flame
blectha
noun. a flame
A noun in the Gnomish Lexicon of the 1910s glossed “a flame” derived from the early root ᴱ√(M)BELEKE (GL/22). Tolkien marked this word as “Q”, but the editors pointed out this is almost certainly a slip for “G”.
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 “a flame” (GL/23), probably derived from the early root ᴱ√(M)BELEKE (GL/22).