A noun for “torrent” in The Etymologies of the 1930s based on the root ᴹ√THOR “come swooping down” (Ety/THOR; EtyAC/THOR). In The Etymologies as published in The Lost Road Christopher Tolkien gave the form as thórod (LR/393), but Carl Hostetter and Patrick Wynne corrected this to thôrod in their Addenda and Corrigenda to the Etymologies (VT46/19). However, in normal Sindarin/Noldorin orthography ô is only used for monosyllables, so thórod is the expected form.
Noldorin
thôr
adjective. swooping, leaping down
thôr
noun. eagle
thôr
adjective. swooping, leaping down
thôr
noun. eagle
thoron
noun. eagle
thoron
noun. eagle
thórod
noun. torrent
thórod
noun. torrent
old
noun. torrent, mountain-stream
oll
noun. torrent, mountain-stream
An adjective in The Etymologies of the 1930s glossed “swooping, leaping down” derived from the root ᴹ√THOR “come swooping down” (Ety/THOR).