Doriathrin
thalos
noun. torrent
thalos
place name. Torrent
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.
An Ilkorin noun for “torrent” (Ety/STAL), apparently a combination of the adjective thall “falling steeply” and the suffix -os.
Conceptual Development: Since the river-name Thalos survived in Tolkien’s later writings (S/123), thalos “torrent” may have become Sindarin, but compare [N.] thórod “torrent” (Ety/THOR).