core, court, croft, crofter, cruet, cur, cure, curer, curt, err, euro, for, force, fore, forecourt, fort, forte, four, fret, fro, fur, furore, orc, ore, our, outer, recto, rector, recur, retro, roe, roof, roofer, root, rot, rote, rotor, rout, route, router, rue, rut, tor, tore, tour, tourer, truce, true, truer, turf