A noun for “horn” appearing in notes on the name Caradhras “Redhorn” from the 1950s or 60s (PE17/36). This word was an element in other names as well, such as Methedras “Last Peak” and Nimras “White Horn”.
Conceptual Development: This word appeared as N. rhas “horn” in The Etymologies of the 1930s under the root ᴹ√RAS “stick up” (Ety/RAS). Christopher Tolkien gave it as rhaes in The Etymologies as published in The Lost Road (LR/383), but Carl Hostetter and Patrick Wynne corrected this to rhas in their Addenda and Corrigenda to the Etymologies (VT46/10). In The Etymologies it appeared beside an alternate form N. rhasg, equivalent to ᴹQ. rasko (Ety/RAS; EtyAC/RAS).
Neo-Sindarin: Some Neo-Sindarin writers adapt its variant form as ᴺS. rasg, but I recommend sticking to attested S. rass for a “horn” of both animals and mountains.
_ n. _horn. >> Caradhras