A noun appearing as G. losbas “ryebread” in the Gnomish Lexicon of the 1910s, a combination of G. losc “rye” and G. bast “bread” (GL/54).

Neo-Sindarin: Since I retain ᴺS. losc “rye” for purposes of Neo-Sindarin and S. bas(t) “bread” reappears in Tolkien’s later writing, I would retain ᴺS. losbas “ryebread” as well.