A word appearing in The Etymologies of the 1930s as N. ostrad “street”, a combination of N. ost “city” and N. râd “path, track” (Ety/RAT).

Neo-Sindarin: Some Neo-Sindarin writers update this word to ᴺS. othrad “street” as suggested in Hiswelókë’s Sindarin Dictionary (HSD), based on words like othrond “stronghold” = ost + rond. I think either is fine if we assume othrad is an ancient compound and ostrad was a late (or reformed) compound; compare N. mistrad “error” which also shows medial str.