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.

Middle Primitive Elvish

lag

root. *cut

An unglossed root in The Etymologies of the 1930s with the derivatives ᴹQ. lango “broad sword; prow of a ship” and N. lhang “cutlass, sword” (Ety/LAG), so probably meaning something like “✱cut”.

Middle Primitive Elvish [Ety/LAG] Group: Eldamo. Published by

yak

root. *neck

An unglossed root in The Etymologies of the 1930s with derivatives like ᴹQ. yat/N. iaeth “neck” (Ety/YAK). It might also be the basis for later Sindarin S. iach “ford” as in S. Arossiach “Ford(s) of Aros” (S/121, WJ/338).

Middle Primitive Elvish [Ety/YAK] 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.